Proc. 2008-16 provides a safe harbor for when a second home will qualify as held either for productive use in a trade or business or for investment purposes. 

I know that we must uphold their leases as long as they are valid.

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Productivity suffers without collaboration inside a workplace.

They come to the forums in search of someone to only validate their question or issue and if you try to ask them more questions, they don't want to hear it.

None of them are perfect, but make sure that the one you select is truly providing you a turnkey product and that they provide you a good quality property manager. 

If not then if they have a valid lease, then you are on the hook for it. 

Since we know they didn’t want to flip, but rather do this leverage home trading, we have to look at 1, the validity of the idea, which we did above and found out, it probably works for some people and 2.

Not all loan products are fit for everyone.

@Jarvis Brown another option is to use Hard Money to buy a rehab, fix it up, and cash-out refinance after the seasoning period into a commercial loan product.