I'm sympathetic to your situation, it seems kinda messed up.

I think you are exaggerating the issue though.

Ideally, an intelligent and flexible application of the ADA rules could be envisioned.

(Ideally we would prioritize research into regeneration and fix the real problem.)

One of my friends was born quadriplegic and literally cannot live without help. He can't go to the bathroom without help. He can't pick his nose. Traveling around Seattle with him made me realize the fact that accessibility makes us a worthwhile civilization. We care, and spend to show it.

Consider: If you spend ten thousand dollars on accessibility for your barn, and no one ever uses it, that's a good thing.

Pick your nose and count your blessings.