Thanks for letting me know about it and the trial period offer.

You should be able to pay off the loan anytime during that period, without any sort of penalty.

Some say grad students ok, not undergrad, others say no students period.  

Further, Reg D 506 C offerings can accept new investors money right away, while other private placement exemptions require a 90 day waiting period for investments from investors with whom the sponsor did not have a prior relationship. 4.

Period, full-stop, no exceptions. 

The question if such leverage is utilized can he weather any deflationary period?

Quote from @Chris Seveney: If you can borrow private money for that period of time at 10% that is a very good rate.

Add to this that there are 400+ houses coming on the rental market in Bennah Oaks in a short period, and we will all be competing against each other to get a tenant in.

I have three listings, 1. unit with a pool and hot tub, 2. unit with a hot tub, 3. both units together as a 12 sleeper.Gross monthly income (after booking channel fees) for the first unit over a 7 month period was $7309.Gross monthly income for both units over a 14 month period is $11,297 (after booking channel fees) As a long term rental the combined rent would be in the region of $5500.Is it possible to sell the property based on the income generated by the STR business or would the value always be based on bricks and mortar comps? 

I think this removes the mortgage from your DTI, but there may be a waiting period.