would also suggest a cab, mainly due the MFC sprayer, will leave other doings of having a cab out. and just say i am pushing for cab for ya.
you never say type of orchard / overall acreage of orchard, along with size of pasture.
i am going to assume either rock or dirt roads going through property to some extent that will be need to be maintained.
the MX track most likely going to get ugly, and with above road/s mention a TNT (top n tilt) for 3pt hitch most likely wanted to obtain a much better finish and get it done quicker.
any sort of hydraulic or like transmission, were you can have nice smooth selection of ground speed.
i would push for "shuttle shift" i am guessing there is going to be a lot of "forward / reverse" going on. and having a little lever up by the steering wheel to quickly select direction would most likely help long term in time.
your going to be see lots of mud. so 4x4 or MFWD or like doing.
never built anything like a MX track, and i am wondering if a 4in1 bucket for the FEL (Front end loader) might be a better idea. "being able to flip bucket portion up. and have access to a push blade might be beneficial.
perhaps pallet forks for FEL, to deal with putting pallet on and a box. to load it up with stuff from ocrhoard, or any other stuff that might be brought in with a truck / trailer.
general duty bucket on FEL (front end loader), getting some "hooks" 2 to 3 across top of it welded on or bolted on. (prefer welded myself)
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overall HP of tractor and then PTO HP. most likely the sprayer going to determine things, maybe lift for forks on FEL for overall lift capacity.
little brain storming see if anything strikes ya as maybe needing...
is there any sort of "tree shaker" to drop fruit from say apple trees or like? maybe needing a higher HP.
no field work, no bailing of hay / straw, no big need for a larger bat wing rotary cutter, no manure spreader, no dealing with larger round bails and stacking them. no real need for a large 3pt tiller. your not dealing with any sort of grain or like.
tree transplanting machine if tree type orchard. ((search google /youtube, pretty small non HP needed thing))
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if tree type orchard, perhaps a backhoe or mini excavator. with notation of MX tract. and getting "compacted" dirt at the higher end of hills. the question comes of how are you going to get any sort of reach and/or drive tractor up hills / bumps to get compaction. a backhoe might be worth while for the MX track, and then digging out old tree stumps.
--if expecting high use of backhoe. might push you towards a tractor that you can pull a lever on seat and do 180 degree turn and operate backhoe. assumption would be 3pt hitch backhoe with subframe.
--if expecting very little use. then just a 3pt hitch backhoe with subframe. and just hope from tractor seat to backhoe seat the rare times it is needed. the limited amount you might need it.
you may get a bigger price discount getting a tractor with FEL and backhoe all in one purchase. either buying new and even used setups. FEL and backhoe tend to be high dollar items compared to most other things. and tend to be a bit more tractor specific. make/model things. so getting together tends to drop price some.
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ya most likely going to see a large amount of 3pt hitch attachments. from compaction to different grading stuff. might suggest some sort of quick hitch or like. ((TIP: you may need to physical modify some 3pt hitch attachments to fit a quick hitch, it is just one of them things))
--exception might suggest by-passing quick hitch, and connect a rotatory cutter (lamen term bush hog) due to weight and how far they stick out behind tractor.
going to push for possible "bolt on tooth bar" for FEL (front end loader) with general duty bucket. i say bolt on. due to it can be rather nice to back drag with regular straight edge bucket. tooth bar is primary to make it easier to dig with FEL. this is push towards MX track. and needing to move lots of dirt around. and needing to dig dirt from some place.
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going to push for high up above "work lights" front and rear. a cab normally comes with these. if open station or sun shade. they might be optional. (can be had for 3rd party more so 3rd party LED kits, search TBN some might bright LED setups out there) it is just one of them things those high up work likes come in handy!
rear remotes (hyd hook ups) a TNT requires 2 hook ups, then one more for a total of 3 rear remotes. some were along the line some 3pt hitch stuff needs a min of 1 hyd hook up. if something needs more than 1 hyd, grab it from TNT temporarily.
--to note it, a side link. only adjusts the one side link, i don't really remember that many folks going for top link plus double side links. most of the road maintenance and various 3pt hitch stuff, the amount that is adjusted by a single side link is enough adjust to satisfy them. you would need a good amount of twists and turns. to justify top link plus 2 side link hyd cylinders. with MX track pending on how crazy it is with curves and side banks, it might be something to consider. and pushing you up to 4 rear hyd remotes.
going to assume R1 / agriculture tires tires will be prefer choice of tires over R3 / turf tires or R4 / industrial tires. so you can keep going through mud. granted you will leave ruts. but you will keep on going for most part.
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about only thing else that i can think of that might come up. is PTO either a 540 or 1000 RPM setup. and that is for the MFC sprayer. granted most things out there getting up there in HP offer either a 540 or 1000 rpm option. and just needing to buy / select correct option.
i want to say mirhanda, has a reversible PTO option. "spins in opposite direction lever" option. it has been to long to remember. if not it is one of the "red tractors" that might offer this option.
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open station tractors tend to lend them selves to having more options for "racks" to mount tools to tool boxes. due to no windows to worry about and a nice tall ROPS. cabs can get little cramped, for finding space to mount stuff. ((having some bailing wire, some channel locks, some wire snippers, a hammer, and some bolt / pins, can come in handy. when something breaks down. vs walking back to the shed, along with place for a shovel or rake or broom, chains or what not))
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3pt hitch most tractors come with extreme basics, make sure ya get the extra check chains / sway chains / stay straps for 3pt hitch. you will most likely need them. so you do not destroy the 3pt hitch or break something on rear of tractor.
double check to see if you get a swinging draw bar. vs a straight flat bar that just goes straight back (one end attaches below the PTO shaft on back of tractor) plus draw bar that connects between the lower 3pt hitch arms. you will most likely end up with something that is pulled behind tractor. and swinging draw bar should help you adjust it from center to left/right behind tractor. thinking more along the lines of "lawn roller" but for the MX track for compaction of dirt possibly and swinging it off to one side a little more. to get it further off to one side of the tractor.