As @Kevin Hunter mentioned, try to do everything - the only thing stopping you from perusing both at the time is your ability to be efficient with your time and prioritize.

My main concern would be your ability to refinance out of any hard money loan with the foreclosure on your credit.

My wife brought up this idea to me the other day and it intrigued me since I've been interested in container homes for a while now and being a metal worker/welder I have the ability to do cutting and welding on the units.  

Keep doing this until you develop a feel for the type of properties you really like, and the type of agent you work well with.2) Choose one of these agents to be a buyer agent, based on personality, market knowledge, and their ability to work with investors.

At these rates, the ability to invest the extra cash flow elsewhere is generally more valuable than saving some tax deductible interest expense.

I like the before and after refi cash flow, I like the 15 year appreciation, and I like the ability to pull all of my money out during the refi to use on the next deal.For me one thing that has always been complicated is the ARV for the Refi.  

The 1031 exchange (and the ability to deduct the interest on your investment real estate loans) may eliminated soon.

Thanks to DeeperPockets.com I now know more about the rental business and am more confident in my ability to turn the house around and protect my investment in my house. 

This will allow you the ability to terminate if she does not work out.

If you do retain them, I would treat them like a new tenant and at a minimum income qualify each adults ability to pay the rent at the new amount, and do a background check.