P.M.
The "ideal feet" approach is expensive, and if you google it, you'll see that there are people who have had increased pain from this orthotic. There are probably people who have been helped, but it's a gamble most people make in desperation after doctors haven't been able to give them any relief.
If you haven't already, I think you'll do better going to a podiatrist and finding out what all your options are. A doctor can evaluate your situation and recommend an orthotic that will me most likely to help you. Anti-inflammatory drugs might also help. There's even a selection of topical creams that could reduce the pain.
I can sure sympathize; I've had a long list of foot problems for over a dozen years, and they can really make daily activities a struggle. Inflamed fascia is miserable. I hope you find a solution that works.