You have run your numbers, are comfortable with construction expenses, have researched the local tenant markets and so forth.  

DFW is a great area, still a very hot market, so make sure you have your financing in order and are comfortable running your numbers.

The comfortability vs profitability is certainly interesting and something I am going to consider as I start to house hack.

Put as much down as you feel comfortable while still having reserves and cash flowing.

Once you get to a point of being comfortable and have setup a team of attorneys and servicer(s) in the states you want to buy in then start buyingOne common mistake I see so many people make us they spend countless hours trying to find dozens of sellers when they want to buy one or two notes.

It's really easy to get 'comfortable' with your service providers because it's simply a pain to pivot to a new one, but as soon as your reviews start dropping because of the quality they are providing you want to be able to quickly and efficiently move to an another crew if necessary.  

If that's the case and if I were you, I would not invest until I'm confident that I understand what my risks are and I'm comfortable with them.

Your wheelhouse/comfort zone, etc. 

What if I put the twin right up against the full and shimmed up the legs so that the top of the mattresses are the same height, and put a king size comforter on top along with 3 pillows?  

DM me if you’d like, otherwise just know there is no substitute for taking action and calculated risks.Phoenix is a hot market so just look at a lot of deals and spend time there so you get comfortable with the area.