I think it would be very difficult to enforce the property delivered vacant as the tenant needs to be served proper notice. 

Even with flips they have failed the septic for non-issues which were eventually corrected on their end but caused further delays.A solution to that could be keeping the power in my LLCs name but enforcing through the lease that failure to pay for electricity will result in a 5-day notice and therefore being ground rules for an eviction.

For example, only 3 out of our 6 units paid their rent on time the first month after we closed -- the prior LL had never enforced lease provisions. 

There are tons of resources on this site to help. depends on your definition of wholesaling  our state Oregon does not agree with wholesaling as defined as advertising properties you don't own and your business model is to never actually own then or just double escrow them.I got tired of this debate so I got a flyer from 2 wholesalers and forwarded them to the state for enforcement.. if any ..

An attorney is likely to tell you to check with the City's Zoning and Code Enforcement Departments. 

Is it worth the hassle of enforcing your contract in a court of law. 

It is one of the six elements that must be present for a contract to be enforceable.

And this goes for the 'due on sale' too, if someone tells you they are going to enforce that, tell them you will stop paying the mortgage and they can foreclose. 

@Abby Smithson I would agree with @Frank Chin and check with your local code enforcement office.

If they are VERY professional, they will have their processes in writing as verification that it is enforced equally and fairly by their entire staff. 6.