If you do retain them, I would treat them like a new tenant and at a minimum income qualify each adults ability to pay the rent at the new amount, and do a background check.  

Try Hudson Home Improvement; Joe Shoback is the owner and his company does beautiful work.

Here is a little background on the deal. 

Hi,My name is Brittany Vaughn and I just joined the site.I have a background in Interior Design and got into the home staging business about 1 year ago.

And no, they did not utilize the huge back yard with the beautiful fence to house the dogs.

I found a mortgage broker and awesome realtor with a construction background.

I have a 30 year background in residential construction(finish carpentry and cabinet sales).

So you can imagine that living in Maryland, the land of $400k 40-year old townhouses, as I read about these little homes, my mind is painting beautiful pictures of free and clear home ownership, with all the magical financial freedoms that entails.As @Doug McVinua very rightly points out, getting permission to build this house in the US may be very difficult and costly.

Hi Bigger Pockets world I'm in the New Orleans area with a background in building.

BEAUTIFUL!!!!