I hope this is not patronizing advice but rather useful info. To be clear, I am not pressuring you to do anything, I know there are many reasons not to pursue discrimination claims, but I wanted to make sure you are aware of all your options.

The Equal Employment Opportunity Commission is a possibly less costly and less adversarial way of pursuing a discrimination claim. They will investigate independently and try to arrange a settlement if they find discrimination. If settlement is impossible, they may even sue on your behalf. They have won a lot of ADA-related claims. I'm pretty sure they will consult with you for free, so the only initial costs are time and emotional energy.