Credit score can help you secure a great rate so make sure to get started on that if you aren't already.

That's not really a full story so it's hard to say, but generally, if you don't feel secure or confident in the person you hired, you shouldn't have hired them.

While I'm not entirely discouraged, I feel like I've invested significant resources (LLC, website, domain) without securing a deal that generates cash flow.Any advice or guidance would be greatly appreciated. 

I know people, both friends and family, who are married to ne'er-do-wells, and the idea of just sticking out a marriage is fantasy land because anyone can file for a one-way divorce, ie the other person doesn't have to want to get divorced for it to be granted.

Do nothing...the tenant isn't renting that area and has no right to dictate how you use it as long as it poses no security/safety risk to them. 

Sometimes it’s the smartest move to gain liquidity and to secure your position with your remaining properties.

Securities and Exchange Commission (SEC):- https://www.sec.gov/complaint/select.shtml3.

Now granted a very well cash up client of a commercial bank can get a rehab loan. but 90% of those out there that get them from PML or HML would never get approved at a Commercial bank.

Building out my portfolio with strategic, secure passively cash-flowing assets to continue to build leveraged equity.

Visa and FinancingYou're correct that securing a mortgage might be challenging without legal status or a W2 job.