When buying my first with the intent of gardening I looked at ground clearance of the tractor and for a unit with a Power Take Off. A 3 point PTO tiller is a work saver in gardening. For me the more ground clearance the better in gardening. Front End Loader - regardless of other options you choose get this one. It is like having 4 young men with you all the time to lift stuff, dig up stuff, move stuff without having the food/car/insurance bills to pay. It doesn't want to borrow the car and need $50 for a date either. Hydrostatic Transmission as opposed to gear is recommended. One with L, M and H ranges - not just low and high. With an FEL you definitely want 4 wheel drive. Guys that can smoothly and efficiently operate a gear drive tractor with FEL should make good helicopter pilots as both feet and hands are required at the same time. If you don't fly helicopters stick to the HST.
Mowing 2.5 acres - I maintain a property with just about that much area to mow. Guy on a zero turn 54" takes 4 hours. Experienced driver on a Ferris ZT. Me on my
L3901 with 72" pull behind finish mower - 2 hours. Both together 45 minutes. Depends on how much tractor you are willing to buy as opposed to how many hours you want to spend mowing grass. If you have a high stress job go for the longer mowing time. Mowing seems to give you time to reflect on life.
My first was a 21 hp 3 cyl diesel "lawn mower on steriods" with FEL and 48" tow behind finish mower. Later got a 54" mid mount mower and a 48" tiller for gardening..
My second was a 32 hp 4 cyl diesel all decked out
B3200 - "my last tractor". Just needed something bigger. HST 3 range.
My other "last tractor" a 37 hp 3 cyl diesel.
So why didn't I just buy my last tractor first?? I did not think I needed that big of a tractor. But I do.
Are you building the house or a contractor?? Regardless a big enough tractor to do real work in that project is a plus. So I have moved the bar way beyond that little big box rider!! Oh by the way a 27hp gas rider mower in now way compares to a 27hp diesel 4 wheel drive tractor.
I don't live in a snow area so I will leave those suggestions to someone that does.