City of San Diego – with industry input – will create administrative guidelines for how ordinance is implemented and enforced.

Another bad news is that SC is starting to enforce short term rental tax on vbro airbnb etc.

To enforce the owner occupancy requirement, NACA places a $25,000 lien on the property for the duration of the loan.

Generally speaking you cannot enforce contractual obligations against those with whom you do not have privity (such as parties, title examiners, title insurers involved in the chain of title). 

There is no enforcement arm for self-improvements.

-IRS liens (IRS may buy the property within 120 days after sale at the price paid at foreclosure sale)-Code Enforcement Liens, Environmental Liens, and Utility Liens-Child Support LiensThese are the ones not included when the seller goes to buy their title insurance...so if I find my own title company, I just have to ask them to include a full title report that includes these right?

If you don't have damages clauses, fraud or lying on application, requirements for millions in liability insurance... you can't enforce.

If the owner treats the park like their own personal ATM, never does maintenance, rents to anyone, then the park with quickly gain that reputation with residents & neighbors and the local law enforcement. 

Since this is a "housing" issue, the HOA absolutely IS required to adhere to Federal and State Fair Housing laws in the application and enforcement of all rules.

They Could file a suit to enforce the contract, make you proceed with the sale….but that is unlikely due to the time and costs it take.