Hi Nick,
I agree with Dan, perhaps your wife could be convinced to buy a duplex that was detached. They exist in Austin although in the more expensive parts of town they are being converted to condo regimes. Its difficult to find cash flowing places in Austin and nearly impossible to do so with SFR. I've owner occupied 3 different duplexes and had no issues with the tenants. If you are going to be a landlord you'll need to learn to deal with tenants and their issues. Might as well get started.
I also think you shouldn't worry too much about MIP. Focus on your overall ROI and cash on cash return. A big advantage to being an owner occupant is the ability to buy places with little down. If you run the numbers you'll find a much better return if you put 3 to 5% down and pay the MIP.
Also, just FYI, but I believe that when qualifying for a mortgage lenders will only consider 65% of your 401k as accessible money.
Good luck.