They rough house.  

BEST DECISION I EVER DID WAS MAKE MY WIFE MY BUSINESS PARTNER THIS YEAR FELT LIKE NEW BEGINNINGS LEAVING A OLD PARTNERSHIP AND STARTING A NEW ONE LITTLE  DID WE KNOW THIS FLIP WOULD BE THE WORSE THING WE DID THIS YEAR TALK ABOUT A HOUSE THAT WOULDN'T STOP SPITTING OUT PROBLEMS FROM SQUATTERS BREAKING IN , FROM THE CITY CONSTANTLY GIVING VIOLATIONS, WE EVENTUALLY TOOK A LOSS OVER 50K OUCH!!  

You will need a local attorney to close on a house.  

Here's how to pin a house and the information it shows. 

Oh the pink and beige house with the tall concrete fence?").

Before buying or renting in an unfamiliar neighborhood, you should check the following two sites: SpotCrime, AreaVibes,These sites provide valuable information, including Livability Scores, which cover aspects such as crime rates, employment, health, housing, schools, shopping, and more.well, anything can happen anywhere.

I'm trying to Figure out how to make this potential deal work.Seller wants to sell but not right away because they still use the house for some income. 

I advertise via Sabbatical Homes and Harvard Off-Campus Housing and insist my leases begin on Sep 1, Jan 1 or Jun 1 and end on Dec 31, May 31 or Aug 31. 

Also, hard money lenders want a scope of work filled out prior to funding the deal so this is a good little hack to get one as well. 

@Pat Aboukhaled I would ULS (unit lot segment) the primary house and include a clause in the call option that would prevent them acquiring the DADU.