And my intention would be to make a fair amount that if the shoe were on the other foot, I would be happy to give away to access lost money.

First, you have to put yourself in the shoes of a potential investor.

If I were in your shoes, this is what I would do:Check with the local laws regarding your rights as a landlord.

If you were in my shoes, how would you proceed?

If I were in the OP's shoes, I would ask my wife to educate her friend about the true value instead of trying to make a buck off her.

That said, the block itself is great, and my agent has included drone photos to showcase the quality of the area.

That being said if I was in your shoes i'd assume somewhere around 35k-45k.

Putting myself in the shoes of the bank on the 80%, I would have the feeling that your priority is paying back the 20% loan, not my loan.  

You have to have a great space in a desirable location with great amenities and design and showcase all of that with professional photos.

As a frequent Airbnb user, I personally wouldn’t choose a place just because an influencer recommended it.If you’re compensating in perks, that might work, but if I were in your shoes, I wouldn’t spend my hard-earned money that way.