@Devin James as a newly married female in her late 20s that chose with my husband early on in our relationship that our financial foundation was very important, I’d say skip the $5k ring.

While working on the house last week, a woman and her adult son stopped by to ask if we would be renting soon.

I would think this is unwise if you have less than 5 units as it may take years to use 5 even with every adult getting credit and background checks. 

Many older people have equity trapped in their homes or have low mortgage rates that make selling and moving difficult.I think it’s wonderful that older adults have the option to share their homes.

There were young people at the games I attended (at a private home) and it was interesting to watch how a ten year old approached the business differently than the adults. 

I can guess that would be a topic of discussion at EVERY female gathering and you would be vilified (this of course is the perspective of the male!)

That's acceptable as long as you have 70' of space with 7' ceilings.Minimum window size: The window must be large enough for an adult to egress, and it must be reachable.

Tenants in higher priced property will be responsible adults with jobs and they will have some level of education. 

(same per unit, per number of occupants (any difference for adults/kids), SF, number of bathrooms) How did your tenants handle the matter?

However, as a young adult it is great life experience, so if he can go for cheap, why not?