So I just need to make a decision and go with it.

Quote from @Blake Winiecki: Figure out how much you want/need to earn, then reverse engineer it to see what options are available. 

I'm considering adding this product for my short-term rental (STR) as well, but I plan to go directly to Waivo since I've already had a consultation with them.

You might learn a very little bit about wholesaling.

What would I need to do to structure the note in order to have a note buyer come in and buy the note or buy a partial enough to pay off the 215k at closing and still have some difference coming to me or the note revert back to me after the partial was paid for. 

Make sure they fit your communication style and prelease the units.

I'm making some pretty big moves right now and changing my business plan in a new direction, so I don't want to die of shiny object syndrome, but this method really speaks to me.

There are rules to follow!

You would have to learn a lot about the sponsor to see/or know exactly what they are doing.

I would also make sure I controlled the checkbook or that we both had to sign the financials.