Do you mean you are a US resident / citizen who invests in real estate abroad or are you a foreignor looking to invest in the US?

The fastest legal way is likely to pay them to leave (only pay after they are out and if they left it in good condition). 

A lot of investors are jumping to secondary lines of insurance coverage and the problem with those is that the companies are based in the Cayman Islands or the Bahamas a lot of the time, and it is suspect that they would actually pay out if the need arose unfortunately.   

@George Blower  Are you sure on the part that you can't take another 401k loan until 12 months after the first loan is repaid?  

That is not what this post is about.

As expected the banks I've talked to thus far (that I have great relationships with) are skeptical about funding.

Also, if you haven't lived there but are a co-owner, you or your friend may not be able to avoid capital gains tax.

Are you looking to stay investing in Southern Cal or looking for opportunities out of state? 

Quote from @Marc Shin: @John Underwood those are some great tips! 

My main concern with this this is it's a separate asset that has to be attached to the structure.What happens when you need to have the roof replaced they're going to have to detach that thing.