I would be real careful with that patch of land. Some years ago I too bought a patch of land with no one around and nothing on it for camping. Today I have a house up there that I go to every weekend, I'm planning to build a garage, oh yes, and I have tractor up there too, and I'm only 34...!
I bought my tractor on a complete whim... I went to an auction looking for the cheapest thing I could find... a Ford 9N, and they had one, but right next to it was a beautiful, not much bigger, green, diesel John Deere 750. It was old, but it was my kind of old, built in 1985, by far the best year for anything with an engine in it. It was also broken, well... so to speak, the wiring was all cut up, the battery wouldn't charge, they got it started and it ran like a top, but once they shut it down, it wouldn't turn over again, and the clutch fell apart a few days after I brought it to my patch. This was a very good thing for me. I'm not afraid of 12V systems and wires, yet everyone else seemed to be so fewer people bid on it. Mind you this beauty cost more than 10X what the 9N went for, I don't regret spending that money at all, it saved me money in the past two years.
I wish I could find an FEL for it, but those are hard to come by for this model these days, yet it is still very useful. I'm currently... Ahem!... painting it... you know, so it looks as good as it makes me feel
Something about that JD green that just draws you in....
BTW, make sure you go diesel, it can sit for months, gasoline not so much. I also put a battery disconnect switch on mine to keep the battery alive as long as possible, no fancy electronics to reset when you disconnect the battery.
Hauling wood, clearing snow, and joyriding is what I use it for, I wish I had more grass to cut with it, oh and my nephew won't stop talking about it at school.
Best of luck, 40 acres sounds like a dream come true for this city boy
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