Good luck on the feet, brother. I've got foot issues myself and they're very tricky to fix. Sounds like you've tried everything I've tried especially if you've done orthotics, which are very expensive if medical "grade".

I've found a local medical supply store (wheelchairs, walkers, lift chairs, etc) that sells sheets of orthotic foam off the roll that you can custom cut, and build up with different types of foam and rubber cement to make a decent custom orthotic cheap. The owner usually hooked me up with enough material for three orthotics at a time for $20, but again it's a locally owned situation with a generous owner.

Best of luck, and as necessary as it might be in your situation, please be very aware of the preciousness of your feet. When they go, they go. Been off mine for over two years unfortunately due to injury. o7

God bless.