Edward,
I'm a disabled VET as well, just getting into wood-turning myself. I live in Lima, Peru because I can't live up there on what I get in disability.
Anyway, as to the dilemma of what to do about the money you make, if your married or have family, they might be able to help you out with the tax's. Heck, most people might not even request a receipt, knowing your predicament.
But as I said, if your married or have family, start there.
Anything worth doing that requires cutting down a tree, deserves doing it right the first time.