For example, an adult tenant who complained about an upper tenant walking loud, 3 years, off and on.

I want to do it as a rent with option to buy for my adult son and dau-in law. 

@James WiseHaving spent my entire adult life in and around the building trades I can attest to the truth in this thread, and indeed it’s invaluable reading for a newer investor who doesn’t understand this world.

It is not uncommon for unmarried adults to have romantic friends stay the night.

When the market crashed our 2 adult daughters and their families decided to relocate to Orange County (our son in law was originally from here).

How to talk to adults, answer the phone, tedious and mundane work.

This makes it harder for these women to break away from this cycle of poverty and adds additional wear and tear on your house (also makes  it difficult for you to terminate leases based on Fair Housing rules).In our case it wasn't mom and dad who produced children like they were PEZ dispensers but their adult daughters who, when tired of dealing with them dropped them off at mom and dads (and my house) to raise.  

The adults have to discuss the things that CAN be done and what are you both willing to do.

They tend to be stable 2-4 year tenants that are adults, don't party without pets or other obligations, and they pay their own way. 2.

@Fausto Carosella I always enjoy expensive adult beverages since I like my wine and bubbles but as @Bryce Sawyer mentioned, it does not work for everyone.