Minor children or grandchildren of an owner of a unit may occupy that unit along with adult parents, grandparent or grandparents for a period or periods not to exceed a total of thirty (30) days per year."

I know in my experience of owning multi family, I was not much more than an adult daycare.

See, if you had only been an irresponsible adult and not paid your bills on time like you agreed to when you signed the mortgage papers you could get a lower rate!

Sorry for all the questions, but I grew up quite poor and am learning all of this as an adult myself.

The tenant's adult son, who has the same name as my tenant, answered the door and my dad gave him the notice.

Risks;  zoning / code enforcement for running a rooming house, more then the county limits on un-related adults in a rental. 

That's what I do.My lease specifies where tenants can park per city/neighborhood rules.One adult could have one car and 10 kids... occupancy and cars need limits on each (assuming your area allows occupancy limits on humans in bedrooms).If your tenant has too many cars, does your neighborhood fine your property... or put a ticket or tow the car itself?

I am very new to flipping houses, however I have been in construction and remolding most my adult life.Currently I have three houses on the market, from my calculation and with my real estate agents help I priced them at what i think is just below market value.

My question is, what do I do with the adult son?

Well, I'm married with two young adult children and we also have one in the oven.