The idea is brilliant, the product isn't ready yet though.

People who makes payment on time and every time understand the importance of building a strong credit profile.

I had a “lender” tell me he’d give me a personal loan with a fixed 4% rate on a 30 year term at whatever amount I wanted because he would like to “build a relationship” with me. 

And have you thought about building back utilities?

Building equity in your house is one of the biggest financial advantages of homeownership.

I would guess that you have little or no experience running any kind of STR, and now want to get that experience on the back of someone else's investment, with little or no personal skin in the game, and that's not a good way to build an investment portfolio.

He is currently buying old houses and reinvesting them or tearing them down and building depending on the condition.

Real reviews from real guests are always going to come across as more genuine.After you build up reviews, the unsaid truth is that you can then afford a less-than-stellar review.

If you decide to pursue this option be sure to EXPLICITLY spell out how the maintenance of the buildings will be handled as these types of facilities tend to be hard on property from my experience.

He ultimately refi’d into a loan that felt hefty at first, but it freed him up to add another unit in the building.