I don't know how true this is or where this data was pulled from, but I've heard docs who are into mold say that generally 25% of the population has a genetic issue with mold. And generally it's only one person from a family who gets really sick due to mold, in their clinical experience.

I think about your situation often and I'm sorry that I don't have better ideas to offer. I have several pub med searches set up for neuropathy that are delivered into my inbox every week and will share them if I run across anything that could be helpful.