RE: I give up!
maybe buy an old old riding lawn mower for about $200-$300 (us $). put the deck to it' s highest setting. your first pass will be the hardest. subsequent passes will just go over uncut grass on half or 1/3 of the deck, cut a little bit at a time. you can also use the mower and a cart to haul stuff around.
i have a 25 year old snapper riding mower, it' s worth about $200. i also have a cart that i can tow behind it. fertilizer, seeds, chainsaws, etc go in it. i even built a 10' boom sprayer w/ 15 gallon tank to go on the back. takes 13 minutes to spray an acre.