(I'm assuming we're talking about grown adults here, and not recent college graduates.)Surely, they were doing something to earn money back in Florida.

There is a whole gigantic generation of new young adults who don't want to get married at 20 and don't want to waste every weekend on home projects and they don't need a thousand rooms.I see a lot of potential for the 2 bedroom starter house to make a comeback.What are your thoughts?

They have the right to stay there until they both die.When they wanted to move in their adult son, he signed a paper that he did not have a life lease and would vacate within 30 days after both of his parents passed,Disadvantage, under market rent. 

Since then I had hoped they were going to act like adults. well obviously not I got a complaint from the neighbor which reached me through a friend on Facebook.

I'm in a group of Adult classmates that gather every year (reunion) and rent largish homes at ski resorts for extended ski vacations. 

This could transform into future BRRRR investments as his adult children take the helm in the coming years. 

It's a family friend renting to an adult child so it doesn't need bells and whistles - I just promised I would find them something to reasonably suffice.Would so appreciate any assistance anyone could offer!

But your age is going to work against you in the near future, because many adults are going to be leery  of “some kid” that says they have some amazing program that they have never heard of to sell their home.  

That's always worked in the end since local lawn mowers are about $25 while I would be $75.You have to remember they are adults and should be treated like adults.

When she left he couldn’t handle the responsibility of being an adult.