If a person is not well capitalized ("...only has business credit cards as a source of capital...") then 1) access any/all available resources (borrow on CCs) and 2) cure the default, as in get the tenant-buyer current. 

MY advice is jump.....here is the thing if you are scared of heights they tell you to go jump off of something tall or out of a plane to cure yourself. 

If they have overstayed the visitor period, or disallowed, send a notice to cure per local law.That is a lot of extra wear and tear on your unit, as well as any utilities you are responsible for.

It depends on exactly what the title issue is......some are simple to cure, some will be a fruitless waste of time.

Make sure you are also pulling the cancellations of default.The problem with defaults is most people are able to cure them. 

Your demands need to be in writing with reasonable time allowed to cure the problem and state that you will seek indemnification for losses arsing out of their lack of timely action.

Standard purchase contracts do provide for an automatic extension of time if seller can not provide title, for the purpose of curing any title defects.

In my world, this sale just turned into unacceptable unless the re-negotiated price covers 100% of the new known costs to cure the property issues to move it back into my acceptable transaction bucket, again, based on my own fundamentals. 

This is a BAD sign and signals the central banks haven't been able to cure the world economies with cheap money. 

@Mario Palacios Regardless of the route you choose (insurance or LLC) for protection, remember that an ounce of prevention is worth a pound of cure.