It's hard to say without knowing more about your financial situation (not that you should post that on a public forum).

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

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

Long term security. 

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. 

Some jobs require that when working remotely that they are at home and not some other place like a public place for security reasons.

This is despite there being other similar single-family home listings in the area that are not grouped in this way.I contacted Zillow about this issue, especially since when I search for my specific listing directly and click on the public view, it shows outdated information (e.g., old history) rather than listing it as available for rent.What is going on with Zillow’s listing display?

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

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

She has a higher FICO score but full of eviction records which I was aware after she moved in and was late for the first time by using another public data source.