Several times in the last few days I have seen/ heard folks talking about "Sensitivity Analysis" so I googled it...My basic take on it is analysis by altering individual criteria to see an adjusted outcome.IE How does an 8 percent vacancy effect the over all instead of a 4 percent.How will a 10 percent Cap Ex effect overall returns verse a 8 percent hold back.Sensitivity analysis - investopediarealestateinvestmentsoftwareblog.com

I see the point in not sharing sensitive information and I do get that tenant can "turn bad" at any point in time.

Are there other creative ways to safeguard this wealth strategy?  

Does anyone use this kind of safeguard in their contracts and could you share what your contracts say in regards to work being completed on time?

Refinances are less time sensitive than purchases, so start the refinance now, with a lock period long enough to cover however long the refinance might have taken (I don't know your situation or the lending culture in your area in terms of "how long does a refi take?") 

Likely to be sensitive to the State, but in Calif it is not true.  

For more time sensitive and transaction intense assets like direct ownership of real property, these plans are typically the better tool for the job.  

You'll just be much more sensitive to vacancies.

It later turned out that the tennants living below us are super sensitive to noises, or that the apartments are poorly built and amplify sound in the apartment below us.

If you file them the correct way (in person, not online, with a few other caveats), we can have you out house hunting as soon as February 2017 (google "4506-T mortgage nightmare" for why I'm sensitive to how you physically file).