As well as guest room in the main house.These properties are all personally owned and obviously highly leveraged.

A well written management contract should clearly spell out what is expected of both the PMC and the owner, to PROTECT both and avoid misunderstandings.

You can DM me as well but there are many experienced sponsors on this forum that I think collectively can provide valuable feedback across the whole country.

if you don't have that relationship you need to get on site as often as possible to ensure things are going well or hire a local property manager to oversee things for you and then rent it out for you.

Facebook marketplace as well. 

Aside from well drafted contracts protecting all parties to a business transaction, the process of preparing and executing contracts in itself slows down processes and allows for more thoughtful decision making, diligence & vetting.

I’ve used these and they work well. https://www.homedepot.com/p/E-Z-Ancor-Toggle-Lock-100-lbs-Ph...

They have always returned principal when requested in the past, as well. 

(FYI, looking in SC and OH, open to other places as well.)

I have a holding company LLC as well and a few other LLC's underneath as operating companies with the holding co being the "sole member" of the operating LLC's as you've described.