No, they wouldn't be. I don't think you understand the full extent of subsidies that rural areas receive. Even with right to repair, and perpetual 2% inflation, the entire agricultural lifestyle in the US would crumble.
There are no production quotas in the US, except on sugar. There are limits to subsidies, however.
I know how the life of farmers goes, and not just in the US. You just have no idea what it looks like when what you're asking for happens. There is a reason that no major economy doesn't have agricultural subsidies.
If those went away, US exports of agricultural products would essentially go to zero.
But agricultural subsidies are far from the only, and perhaps not even the largest, type of subsidy that farmers receive.
Indeed, farms in the US are greatly under-taxed. Despite the median farm household income being much higher than the overall median household income, farming households on average pay around 14% in income taxes, around 4900$ in property taxes.
This is is much lower than the tax load of the average US household, and much lower still than the tax load of the average US household of the same income.
Thus, if you wanted to actually end the support that farms are getting, you would also need to raise taxes on farms significantly, and cut subsidies. Then you'd also have the fact that the average farmer requires much costlier infrastructure than the average city dweller in per-capita equivalents.
Would it really be possible for US farms to make a living if their taxes were almost doubled, if all subsidies were ended, and if prices were allowed to fluctuate? The answer is, definitely, absolutely, not at all.