Property has lien and adverse possession claim filed

[Account Closed]

I recently purchased a property in a foreclosure that I could literally profit up to 80k or more. It has a few cosmetic issues on the outside with no idea what's going on with the inside.  the other little detail, it has a tenant that's been living there for over 11 yrs., since the original owners abandoned it due to their financial difficulties. They don't want to move, and has a lien and adverse possession claim against the property. I made them a $6k offer, cash for keys, but they're asking for five times that. I'm already in for 150k, what do I do???