I think you're underestimating the size of 200. ADA compliance is a worthy cause, but at that level of effort I think it would make more sense to create an advocacy group and try to bring about compliance through public pressure than individual lawsuits.

Nevertheless, I don't have a lot of sympathy for the business owner in this case. If you open a business in a non-compliant site 17 years after the ADA went into effect, and 13 years later still can't build a ramp, it might be time for another business to occupy that site.