Securing loans with a low credit score is possible through private or HM lenders.

A smart seller will have note, deed of trust/mortgage/etc. prepared by a local real estate attorney (yes, he/she may work with/at the title company) and be sure the security instrument is properly recorded in the land records. 

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. 

Security systems are a giant headache for short term rentals.

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

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

Nice user interface, simple to set up, free door lock automation.We migrated to OwnerRez because we wanted a direct booking site and security deposits. 

Well there's a reason they screen their borrowers, secure their loans with a first position trust deed/mortgage and charge a small fortune to make such a loan.

You should secure that switch (or that area), so you can control who accesses it. 

Tell them if they don't, you will take it out of their security deposit and they will have to replenish their deposit.