I can tell you that you won't secure a REFI term longer than the term that is left on your lease. 

Section 8 tenants are another way to secure rent payment with government backing.The Midwest is a solid market for rent growth, cashflow, and decent appreciation.Look at a market like Lansing, MI.

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. 

Can I use her security deposit to cover these legal fees I've incurred due to her not moving out?

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. 

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

Let the reader determine which of the responses makes more of an emotional connection.Not saying that's what happened, but an interesting hypothetical... :-)

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

Don't make emotional decisions because you are "in love" with the property 

I’m curious, what’s been the biggest hurdle for you when it comes to securing funding for your real estate projects?