You flirt dangerously with TL:DR and lack of paragraphs. But I got through anyway. In rebuttal:
1) The farmhands - fewer than ever and fewer still - don't have jack squat. But I never met a farm owner who didn't buy all new vehicles (pickup and car) every three years or more often.
2) Farmhands often live in squalid conditions. But farm owners usually have the finest homes in the county aside from the few physicians and lawyers who still practice and live rurally.
3) Horses also die unexpectedly, break legs / etc., can be injured during the reproduction process, and have far less power than tractors of fifty years ago. If horses were truly superior to power in terms of productivity, they'd still be in use today. Duh. And if modern computerized tractors weren't more efficient and profit-making than tractors of fifty years ago, they'd never be bought. While farmers must have new personal vehicles, most I've known in life will never dispose of equipment unless swapping makes them more money.
4) It is common sense that, were farmers to truly co-op and fight, food prices would go more to the farmer. But they don't.
5) Yes, deglobalization is a nice thought. Go for it. But, when nobody buys your bug-ridden crop because the processors can get healthier meat shipped from over a border cheaper than you can produce it... Good luck.
6) Yes, farmers and hands do work long and laborious hours. So do many others, and I feel much more for the fast food fry cook than the average farmer or hand. Just sayin'