Hi there! I’ve recently acquired a 35 acre property in WA. It is 90% 35 yr old Douglas fir forest. Planning to put in a road, trench utilities and most importantly, clear and de-stump 4-6 acres for a regenerative farm.
I am not familiar with the term "regenerative" farm.
However, for a hobby farm of 4-6 acres most T-B-N contributors will recommend a compact tractor with less than 26-horsepower to avoid complex Tier IV emission controls required on tractors with over 26-horsepower, plus a bare tractor weight of 1,700 pounds to 2,800 pounds.
Kubota
B2650 @ 1,800 pounds bare tractor weight or Kubota
L2501 @ 2,700 pounds bare tractor weight would both meet your needs for six fairly flat acres. Both are available used.
With tractors weight is your friend.
VIDEOS:
If you intend to take the tractor regularly into thirty acres of woods you will want a wider ( therefore more stable ) tractor with at least 45-horsepower to operate PTO powered implements, most especially a heavy duty 72" Rotary Cutter / Bush Hog.
Tractors are inherently unstable operating on sloped ground. Tractor rear wheel/tire spread, sometimes adjustable, is a critical factor increasing compact tractor stability working sloped or uneven ground. Rear axle is the tractor component on which rear wheels/tires mount. A 6" to 10" wider rear axle substantially decreases tractor rollover potential. Tractor width is an approximation of rear axle width.
Larger wheels and tires yield more tractive power over uneven ground pulling ground contact implements and logs, pushing a loader bucket into dirt and pushing snow. Larger wheels and tires permit heavier tractors to bridge holes, ruts and tree debris with less operator perturbation and higher ground speed.
When considering a tractor purchase bare tractor weight first, tractor horsepower second, rear axle width third, rear wheel/tire ballast fourth.
Selling a used tractor is easy. Selling multiple light implements in order to buy heavier, wider implements for a new, heavier tractor requires a lot of time. Depreciation on implements is worse than depreciation on a tractor.
GOOD LUCK IN YOUR SEARCH!
Except for those who grew up with tractors we all began with your experience = zero.