You should own their commercial rental property in a limited liability company to protect your other assets and savings from claims and liability for the actions or omissions of tenants, contractors and others. All sophisticated and well-advised owners of real estate do.
If undisclosed defects are bad enough that the buyers really don't want the property, rescission should be available and may be a better remedy than selling the property at a large loss and then waiting to see whether the loss can be collected from the sellers. In some cases, like the June 23, 2015 case of Wong v. Stoler, when the property is unsalable, because of the nature of the undisclosed defect, rescission may be the best and even only realistic remedy. In many cases, the judge, the mediator and the lawyers give up on rescission as impractical. After Wong v. Stoler, rescission is again a realistic remedy.
You have just moved into your new home. You read books and articles about how to buy a used home. You hired a well-recommended licensed Realtor to help you find and buy your home. You hired a home inspection company and a general contractor recommended by your Realtor to inspect the home. You read all the disclosures and reports. And still there's a problem.