I'm thinking 24-35 hp machine... backhoe.. auger, cultivator, box blade, angle blade, and optionally, plow, disc harrow, chain harrow, spring tooth harrow, york rake, fel or rear scoop, and a mower suitable for what you cut ( sickle, rotary, finish... ) maybee even a tiller... maybee all if you have money falling out of your pockets...
The field equipment will vary based on what you are growing, and how you maintain it.. row crop.. etc..
Size of the machine will vary based on the amount of property you are maintaining, and how often you maintain it, and how long you want certain jobs to take. For instance.. mowing... if you only do it once a year and have all week.. a 4' mower on a 24 hp tractor will "get 'er done".. if you need a bigger mower.. or spend less time.. you will need more hp.. etc..
Power steering and 4wd recomended for loader use.. may also want HST tranny for extensive loader use... However.. gear and 2wd and manual steering would work.. you just end up with stronger arms and a big left leg.. /forums/images/graemlins/grin.gif
Soundguy