What would you do? Help!

[Marcos Torres]

What would you do? I currently have 3 units. One unit is a single family home. The other unit is a duplex. I own the single family home with a close friend of mine. The house is fully paid off and is worth about $100,000-$125,000. 

I have an enormous college loan that is around $52,000 and rising annually. I have the ability to pay it off, but that it comes at the cost of giving up my share of the single unit. I can have my friend buy me out and pay my loan off or sell the home and try reinvesting to help pay the college loan. 

Thoughts??