Electing disregarded entity status avoids additional filings while achieving the same tax outcome.This post does not create a CPA-Client relationship.

Give them a 60-day notice, then charge them a prorated rent for the additional 20-day extension.

Additionally, there was no business license registered in the City of Atlanta.Suspicious Communication: The individual identified as Chris Anderson had a heavy foreign accent and provided convincing but dubious claims about the company's legitimacy.Questionable Financial Arrangements: Upon loan approval, the wiring instructions directed the loan fee to a Capital One checking account under the name of a supposed loan facilitator—a 85-year-old woman in Florida.

What would be my best route to take if we need additional finances?

Give her 30 days notice now, keep her security deposit, and send her a additional bill for damages to the unit in lieu of taking her to court for the damages.  

I have never built a home before and I do not have 'construction' experience aside from renovating my own spaces (so i do have experience- just no formal experience). 

Additionally, regarding the legal structure, an LLC seems to be the most suitable option for our situation.

We had to move fast and initially decided to sell it, the relator who was helping us somehow convinced us we should make it a rental property......... and let her be our tenant (insert face palm here) so since we had no real estate experience and we were already moved away, we agreed.

You should always require them to add you to their policy as "additional insured" or "additional interest" and you will be notified if they cancel or change their policy.

I created a co-hosting profile as I was looking for additional opportunities.