I would encourage you to do both.

Why would somebody encourage you not to take advice to protect yourself unless they are a scammer themselves?

Thanks for the encouragement! 

Unfortunately, the BP cheerleader squad will encourage you to operate with deception and lies.

I would strongly encourage you to refi as @Jay Hinrichs mentioned and take her out of the picture completely. 

Thank you all for the encouragement and advise, greatly appreciated!

So you want to screen for a good tenant/buyer and not just accept the first party who is interested but has little chance of ever qualifying for a loan and cashing out the owner.Also I strongly encourage you to consult an experienced real estate attorney to make sure you are complying with state laws (specifically your state's real estate commission laws). 

You've got some great guides for important things like keyword alerts; I'd also encourage you to check out the podcasts (great inspiration, especially while working on your properties) as well as connecting with local RE groups (whether via BP or other sites like Meetup) if you haven't already.  

Realistically speaking, if they are, I'd boot the one paying the lowest rent with a 30 day notice and then move in to that unit.I would strongly encourage you talk to your lender regarding the occupancy policy in your state.

If you haven't already, I'd encourage you to read through The Ultimate Beginner's Guide to Wholesaling and get connected at your local REIAs (check meetup.com).