To reinforce the idea: educate yourself and your girlfriend prior to taking action, then move forward. 

In fact, this strategy helps REINFORCE to NOT co-mingle. 

Clearly you've found value there which only reinforces this thread. 

Type IB is the poured concrete alternative (reinforced concrete or steel frame), which prices at $160.49 psf.Remember, that's for every single square foot, and it's just hard costs--soft costs rise proportionately.

I am sure there are properties in the Phoenix market for which BRRRR works but so far I have not seen any deal with a purchase price below 70% (we actually need to hit the 50% mark if we want to rehab and pull our money back out). in his profile page, @Shiloh Lundahl mentions a coaching program and says: "This type of coaching would not be as valuable for someone wanting to learn how to wholesale or someone wanting to invest in expensive markets (over 150k medium home price) or someone without a current income"I guess this reinforces my assumption that in such a hot and expensive market such as Phoenix, making BRRRR work is this much more difficult than in cheaper markets, right? 

Same contractor recommended we have the post and studs reinforced from the outside, which I would pay for and he would pay for replacing the siding insulation styrofoam and water proofing….

This will clarify and reinforce what you are reading.

The plan is to have the place ready in 60 days and most of the work will be the landscape, relocating outside aircond, putting in a pool, and reinforcing the balcony so most of the work will be outside.  

Your arguments keep reinforcing what @Ben Leybovich is saying.

Additionally, if they have income, credit, little debt, clean car, and are clean looking then that reinforces my gut feeling.