It is not uncommon, particularly in university towns, to find occupancy limits on the number of un-related adults per dwelling unit.  

@Brian Coons - Thought about it some more...Maybe you're referring to buying "exclusive leads" from someone?

I'm in Missouri, and use a non-exclusive agency agreement when appropriate - that means I only get a commission when I find the deal.

Or of course you could sell your primary residence tax-free (I assume that someone in his 20s wouldn't yet have held his primary residence long enough to have exceeded the $500,000 exclusion).  

(Other houses for sale or rent in the area)I believe most adults take showers but families with kids will generally want a tub.

Just don't sign any exclusive representation or similar paperwork. 

Exceptions happen and can be discussed among reasonable adults, but the relationship needs a foundation within the rules, not within the exceptions.

Albert,A real estate purchase option is a contract that allows you to have the exclusive right to buy a specific piece property.  

Wonder if you would qualify for the sect 121 exclusion prorated for living there less than 24 months.There may be creative ways to assign your interest as you are not officially the owner of record but I am not a tax person.  

I have been using a company called Payclix.for my properties Apartment complexes and Mobile home parks For rent collection any type on fees or deposits  .I Liked the  concept so much I joined their Company .You can go to PayClix.com to see how easy it is and they have an exclusive Accept or Reject Module so you are in total control  You can choose to Reject a partial payment to avoid 3 day notices and evictions If you reject it no harm no foul .They integrate into your Existing acounting system or they can create one for your needs .It's made my life and my property managers lives so much easier.Checks ,Credit and debit cards .A tenant would much rather pay online the night before with a credit card than pay a $60 late fee .With a click of a button .