More info please
Is the land "lawn", or does it require a brush hog (rotary cutter)?
What kind of implement do you have now, belly mower, rear finish mower, brush hog?
I think you can't go wrong with a compact or subcompact tractor, but depending on all you might want to do with it, if you need 4WD or not, or if you want to reuse anything off your other tractor, makes a world of difference on the size you look at. And how quickly you want to get done with your mowing..... belly mounts are so much quicker to mow with.
And even the smallest tractor will still beat up your lawn a bit compared to a lighter riding mower with 2WD and turf tires. Plus riding mowers (lawn tractors) are so much more maneuverable.
Personally, I buy orange