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I own a JD 790 or 3005 as it is called now. It is 27hp and gets considerable roles around houses and tight spots. It has for different clients and myself leveled spots for sheds and yards, tilled up for re-seeding tight, cramped areas to almost an acre worth of lawns in size, moved manure piles, relocated yards of gavel and dirt, rotary cut or "brush hogged" places that bigger cutters cant or is to much for a lawn tractor, tilled existing gardens, installed brand new gardens, plowed ALOT of snow, the list is long... The 790 isn't a hydro but it has the nimbleness and the size/power for a vast list of chores that include tight spots or fairly open. I would stick with something in the 25 to 30 hp.
That weeds out the overgrown "lawn tractors" and keeps you more in the compact utility sized scheme.