I've seen debtors pay within two weeks, and sometimes it takes years until they need credit when all of a sudden they'll reach out to you to eliminate the debt on their credit report. 

Converting your STR to a primary residence for 2 years can help avoid some capital gains taxes under the Section 121 exclusion (up to $250K or $500K if married), but it won't eliminate depreciation recapture.

You set your screening standards at a level where they will most likely not qualify, as a example setting a high credit score requirement will eliminate many on disability.You keep taking applications until you find the highest qualified applicant.

Going lead free in old homes that are pretty 1950 usually means eliminating old radiators, getting the lead off them, or replacing them as well as eliminating all old trim aa well as cornices and even fire escapes. 

I would personally avoid something that restricts your rental use even if it is only 6 months because who knows when they decide to eliminate it all.

Eliminate debt, establish a budget, and save.

Eliminating any possible benefit of the trust.

But for me the complexity of getting out of an S corp plus the cost of running one just didn't make sense when I could eliminate net income so many other ways and still get the pass through from disregarded or series LLCs. 

While the interest rate might be higher, you eliminate the risk of needing to refinance or sell later, making it a safer option if your goal is to hold the property long-term without any financial uncertainty.If maximizing cash flow now is a priority and you're comfortable managing the future refinancing risk, owner financing with a balloon could be the better choice.

Next as far as the clawback, it is what it is there's nothing you can do to eliminate it.