Instead, there is an option period, with a (mostly) small option fee whereby the buyer can cancel the contract for ANY reason within the option period.  

In the Pace Morby parlance I have come to learn that the gap funding or equity component is called and ET or "Entry Fee"..

I do not think they are sketchy is just that they do not go by all of the state regulations and they might charge you a cancellation fee or increase rates more often.

Another factor to consider is the part of town your property is in and if you would have more issues with tenants due to issues with shared space.

Are there specific factors or trends you would suggest evaluating to make a more informed decision?

All of those factors will guide you on doing a buy down.

Depreciation for what is left after bonus depreciation, the building itself, is indeed prorated, however it's a relatively minor factor compared to bonus.And read this post please, since there could be other things not mentioned by influencers: https://www.biggerpockets.com/forums/51/topics/1122635-the-s... 

Quote from @Sharon McCants: Consider all the factors before making a decision.

@Nakul PatelBest asset protection is an insurance policy, you open a LLC then you are gonna have to pay like $850 a year for it if you are in California even if it’s a LLC in another state plus other fees and costs.

If rent is not received by the fifth of the month, a $100 late fee is imposed.