For example, you might agree to a 70/30 or 60/40 split, depending on his level of involvement.

The loan is with you, not with your tenant, so none of that means anything to them - in fact because you live in one unit and it's under 4, if you were self-managing you don't even have to abide by fair housing laws (at least on the federal level). 

People have brought up interesting ideas to help you get to the next level.

My 2 cents: it sounds like you've got to pick a lane and stay in it, become an expert, and level up in that lane.

If the guest feels slighted, there is no fact checking service provided by AirBnB to confirm their claims, so it is up to you to let future guests know the level of professionalism you provide.If you are able, I would recommend editing your response to the 1-star review.

You'll likely need a higher down payment if you can find anyone willing to finance something like this as a first time investor; many require some level of rehab experience at the very least.

I agree that I am bullish on this taking the PHX market to the next level.

What's your experience level at this time? 

I can send a million articles, but i encourage you to go to maricopa.gov in addition to the city websites where you will see all the development going on here at a micro level. 

You profit share with them for the first 10 deals (at the higher levels) because they really are right there with you holding your hand, and as I mentioned, doing three way calls, etc. every step of the way.