you really did not show big numbers as in acres. like on a farm. and the few jobs you noted, are not that big, granted smaller tractor will take some more time getting jobs done. but difference between bigger tractor vs smaller tractor. i would say go with smaller tractor 25 to 30HP
smaller tractor with extra bells and whistles vs larger tractor with just basics. get the smaller tractor with bells and whistles. many of the bells and whistles can come in more handy, and can make things faster, than just a bigger tractor with more HP and weight.
granted there are some tasks that a bigger machine is justified for.
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you noted enough things, i would highly advise getting a backhoe with subframe, if buying new, you have bigger chance of getting more of a discount when buying tractor, FEL (front end loader with bucket) and backhoe all at same time.
personally prefer a TLB (tractor, front end loader, backhoe) were i can move a lever and seat does 180 turn to let me operate backhoe. it makes backhoe use much quicker. vs getting off tractor and walking over and hoping onto the backhoe seat.
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extra bells and whistles, would be rear and front work lights, mounted high up, either on ROPs, or sun shade or on a cab. they really do make a night and day difference. both in extending working time in fall / winter, more so removing snow, to unhooking equipment for the night. or simply use tractor as a portable work lights.
TNT (top and tilt) for 3pt hitch. you normally have some turn buckles (large bolts with a nut you twist in the center) to adjust the top link and angle of the 3pt hitch lower arms. but with TNT it replaces them with hyd cylinders. so you can just move a lever to adjust 3pt hitch angles. comes in handy for dealing with dirt / rock / gravel roads, were you have a lot of different "crowns" within the road. (turns, hills ,etc...) and using rear blade, to box blade, to grader blade / land plane. vs having to get off tractor every time, and manually adjust the 3pt turn buckles.
you gave enough projects, that i would most likely stay away from a regular "geared tranmission" were you have to push in the foot clutch when ever you wanted to change gears or go from forward to backwards. unlike a car or truck that is a manual shift. once you get moving there is not much to shifting, but with a tractor, you are constantly changing gears, and going from foward to backwards on projects. and it is like being down town, and having to stop and go every 100 feet in a vehicle. it gets old quick and takes extra time. let alone after a full day being on tractor, your foot, is completely numb and hurting with manual gear shift.
min of one hyd hook up on back, not counting for TNT, but might suggest going with 2 hyd hooks on back, 2 should cover majority of implements out there that you may ever get. for 3pt hitch.
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extras that a dealer or you would most likely add, is chain hooks on bucket of the FEL (front end loader),
area for a small tool box on tractor to carry, hammer, pliers, some bailing wire, flat head screw driver, channel locks, and couple extra pins for what ever implement is on tractor.
having rear tires filled with a liquid. not everyone does it, but it might be worth while for you.
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the HP ranged i noted about, puts you in an area, were you might be able to pickup a "belly mower" or MMM (mid mount mower) for mowing regular grass.
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bush hog (rotatory cutter), PHD (post hole digger), plow, discs, tillers, snow blower, grabbels, thumb for backhoe, vacumm, etc.... all can be bought after you get the tractor. but things noted above, if buying new, may just be easier and come out a little bit more if you have dealer put the extra bells/whistles on to tractor for you. vs you doing things later.
exception to above, is if you want a grabbel for the FEL. it might be easier and cheaper to get the extra function hyd and hoses installed by dealer when just buying it, vs adding it on later.