A lawn tractor won't cut it (sorry for the pun...).
A Ford 9N was a wonderful tractor 60 years ago, but today it doesn't have the features that would make farming safe & fun & enjoyable for you. Their hydraulics, 3pt, and gear selection is poor, for what a person wants to do.....
What you want is a compact diesel = JD, Ford/NH, Kubota, JD. Some of them are 15 hp or so and not much bigger than a lawn tractor, but they have a real gearcase, a 2pt hitch, and so forth.
Avoid the one's from China they are junkie, you can get a 15 year old one from the models I listed in the 15-25 hp range and not spend too much money.
Define what you want to do tho, if you plan to bale hay, you need a 35 hp tractor with a live pto to enjoy yourself and handle a baler.
If you want to blow snow, you need a selection of rear speeds and a live pto.
If you want a loader, you want live hydraulics.
If you want an older USA tractor, a lot of the features you would like started appearing in the mid 1950's, and you might want to start there for an older tractor to use.
Then again, if you are looking at an acre of garden, a good stout 'lawn mower tractor' with a tiller might be just the ticket for you.
Probably need to know a little more of what it is you want to do exactly now and in the future.
I was really helpful, eh?
--->Paul