None of the lawsuits had a material affect on the business.

The vast majority of lawsuits against landlords involve wrongful eviction, security deposit disputes, and Fair Housing Violations.

I still tried to reason with her to see if we could repair this, but she hired a personal injury lawyer (who happens to be a cleaning client of her) to start emailing me demanding I give her $125,000 for her 1/2 of the business, or else they are going to file a lawsuit.

Be prepared to start a lawsuit.2) File a complaint with state's Board of Realtors3) File a complaint with state's Attorney General's officeSince these are unlikely to be permanent solutions, you'll also want to start searching for another PMC.Recommend you speak with @Russell Brazil

The LP protects against this as well as losing everything in a potential law suit. 

They consistently place homeowners in the position of insurers, all while aggressively marketing their own "insurance" that they practically never pay a claim on.Highly unethical, and I am quite surprised that Airbnb hasn't faced a class action lawsuit from damaged homeowners.

I've been involved in a lawsuit that settled right at a million dollars, and that was over 20 years ago.

Whatever happens with you, seller, and your earnest money dispute or any potential lawsuits over it are completely irrelevant to me.

If you fail to follow the rules, you may open your personal assets to a lawsuit.

Given these circumstances, I believe there may be grounds for a class action lawsuit against these companies, and their owners.