Then there is choice as adult, to do what is required, yes it's hard and can suck, to go to college or university, and again PUT IN THE WORK, or not, spend early 20's seeing how many brain cells one can fry.

To the tune of dang near adopting a grown a** adult, providing her free shelter, utilities, and access to his land?

My reasons for not wanting the cash was that I’m pretty sure both sides were drug dealers, I then had cash overnight in my home, the tenants that knew where I lived also knew that my spouse and I work the overnight shift so in turn the money they just gave us was sitting there alone if they or their adult children or a friend they told just happened to come break in looking for the cash.

My parents are wanting to transfer their paid-off home into an LLC owned by their 4 adult children, me included. 

I'm not quite sure if you meant your past rentals were used for adult care or not, so if not, it would be beneficial to start by reviewing the city/county code requirements for converting a residential home into a care home.

The neighbors are not comfortable with going over to ask them to leave because there are multiple adults in the car.What would be the best way to navigate this issue to stop it from getting worse...they may try breaking in and turn into squatters next.If I was there I could call the police...but I am not. 

Young adults move back in with mom and dad.

See if the adults need to pay for any damages or repairs that arose since move-in.

There are two adult children that would be on the will if anything were to ever happen. 

I can't believe the number of grown adults in here that take this seriously.