People are going to go where their ethics and moral compass lead them, what they may not understand is how their reputation is formed.

However, after the lender's appraisal, it was discovered that the house was almost 1,000 sq ft larger than what was recorded, boosting the ARV to $415K.  

I would think ABNB would boost occupancy sans fees?

Morally, I don't give a crap they're not married, but that does allow either one of them to walk out at any time without any liability or obligation.

The return on investment might be lower than being leveraged, but you can sleep at night, and if you do NOT need the cash flow now, putting it into more properties certainly can boost that return.

This will also be explained to listing agent at offer submission, that "there's a good chance you may wind up getting both commissions in this transaction"...The only moral or ethical issue I could imagine here would be that "my intentions were wrong from the start, and/or I have used my expertise to take advantage of someone."

If you have some moral obligation, provide additional collateral for the loan.

It does boost the value at resale of the home as the trees and view in the winter is better than looking at a house.  

I did this because the apartment was cheap and used the horrible 120 volt electric driers that took 3 runs to actually dry a full load of clothes (they were piped wrong as well).Anyway, moral of the story, you will most likely not get an engineering student who is bored and anal enough to do a cost analysis on his laundry lol.Here's a quick summary of what it costs to do laundry with Anchorage electricity prices:

Brandon Turner thanks for the reply, that's exactly the confidence boost I was looking for.