Great stuff so far. Please keep it coming.
As for the garden, vegetables mostly plus some potatoes and some tomatoes. But, the main thing is the orchard. Peaches, lemons, grapes.
Think about the orchard ahead of time. DW and I lived on a property that was just over an acre, but had mature apple, plum, peach, apricot and persimmon trees. We were just on the outskirts of town, and had a lot of friends. When even one of those trees produces fruit, it
produces, and the fruit all comes ripe over about the span of a month or less. It wasn't worth the effort of picking it to sell it, not enough to make the money to pay for our time. But each tree was 500 lbs. of apples, or peaches, or apricots, or whatever. We couldn't give that much away, couldn't eat more than a small percentage, and it made a big mess when it hit the ground and eventually rotted.
Just our experience, but we won't ever have fruit trees again.
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As far as the regular trees go, trying to pull a stump with a tractor and a chain is not the right thing for a newbie to do. Not with a 30-40 hp tractor. You need a real factory drawbar, the item that attaches to the bottom of the transmission, not the thing sometimes called a "drawbar" which attaches to the arms of a 3 pt. hitch. Medium stump, small-medium tractor, attach chain to 3 pt. hitch "drawbar" -- flip tractor over on its back.
As has been said, this requires a backhoe attachment. When you cut the trees leave a 4'-5' stump. This provides leverage for the backhoe to break the roots and get the stump free. If you are going to do this with a backhoe attachment you need the one that has a subframe on the tractor.
Or, you could cut the trees down, deal with the wood, and then rent a mini-excavator for a day to get the stumps. Of course you need to fill in the stump holes with something or you are going to have pits large enough to burry a pony... That 4'-5' of trunk you left for a lever arm can easily become firewood at this time.
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There is something I have found to be absolutely invaluable in a property this size and up. That is a dump trailer and enough truck to pull it. Depending on your age, you might get away with just a truck, or a truck and a landscape trailer, but there is nothing quite like pushing a button and watching that trailer unload itself.
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Another thing to think through is what you are going to do with the trees you cut down. If you have a fireplace, you will get years worth of wood for your area of the country, but it has to be split.