Is there anything else I should do to screen the renters?

The area is loaded with men on 1-2 year contracts who have homes some where else and they just need 1-2 years of safe, clean, comfortable housing and the only other option is seedy hotels.  

The second best comment which I also love to make but someone else beat me to it is how an appraiser values the property which is comparable sales in residential vs the income approach in CRE.

I agree with everyone else that the downvote is more apt to be used for purposes other than it just being a bad post and the best remedy for a bad post or a bad comment is to quote it and engage with it and give your side.

What happens if you sell a property to invest somewhere else and make a mistake?

@Brandon StainesOption 1: do nothing you stay on mortgage and good is you still own 50% of house but bad is if she defaults then it hurts your credit tooOption 2: have her buy you out but that would require a new mortgage at a much higher rateNot much else you can do.

Everything else you said was spot on.

After reading everyone else's comments, I may have a controversial take, but here goes. 

Saw value where no one else did everyone was perplexed why I wanted to buy a swamp.

Something else to consider is that once these properties are paid off, you could cross collateralize to purchase additional properties that fit your buy box so that you may not need to bring cash to the table for a down payment.