RV parks, mobile home parks, house hack rentals and such are the way we are headed.  

We find that most travelers are looking for something easy and want one price and payment that includes rent, utilities, parking, etc. all in one.

Jay, yes, all fish in the national park are wild; there has been no stocking since the early 1970s.

It goes without saying that you should get the lease agreements as soon as possible so that you can have some transparency into the number of occupants, the rent, any agreements, utilities paid/not paid by the tenant, parking, storage, responsibilities like lawn/snow, expiration dates, special clauses, etc. 

So think walkable (bonus) or by public transportation, if not garage parking is a must for when they come home late.

Quote from @John Park: Hello All, 1st time home buyer here - looking mainly in Fairfax/Arlington counties, with loudon being a last resort. 

We are about a month away from having the dedicated parking spot finished (gated w/ keycode access).

The parks are now take a couple hours a week for management and people in the park are always willing to help out. 

Do you meet with us routinely to be proactive and do planning?

If you're going the umbrella insurance route, perhaps see if it will cover you for several things including just the routine slip and fall (like mold or earthquake).