Give proper legal notice of non-renewal and get them both out.

@Anade Davis Agency: either FNMA, FHLMC, FHA, or VA.Look for land contracts, where seller provides financing.

Purchasing the LLC gives you ownership of the property, but it also opens you up to additional legal exposure since the entity has been active, and there is no way to really know for sure what else they used the LLC for.

This provision, through the Affordable Homes Act, make ADUs legal BY RIGHT in any single family zoned property in the state.

I am too lazy to look it up, but pretty sure it is legal.

So how do I get out of the contract I signed?

Property Bank StatementsTitle, Appraisal, Environmental, Survey Reports – If availablePurchase Contract

They seem legit insofar as everything seems legal and kosher.  

If you are a legal property manager in your state the owner should have the unfettered ability to allow you to act as his/her agent to enforce the lease, whatever provisions they may contain plus whatever your state laws allow.

Once you know what is legal (seeing other listings in a particular area does not count as people do it in illegal areas all the time).