But then you have the benefits of using it yourself, plus you'll build equity if you choose the right property.

Chris answer is spot on.I'll add "quick closing".You won't find investors easily, you have to go to a lot of meetups to build them.

I've also leveraged that capability to build some pretty cool dashboard on my end to occupancy, revenue, and cancellation rates across all platforms. 

Go to BUILD YOUR TEAM at the top of the screen and look for local investors or meetups in your area.

As long as the ADU is under 900 sq. ft. and meets the state building code, there will be no variance or special permit needed, so no ZBA or neighborhood meetings.

@Jacob Flaxman, I am not familiar with this market, so take what I have to say as more of a general comment.My first thought is $250k to build a two story, two bed "house" will cost more than $250k. 

You're in a strong rental market, and house hacking a small multifamily in Phoenix is a smart way to build wealth.

The process to build everything out for clients takes longer then anticipated, but once done they're great sites with software to help manage marketing.

No, your nobody special and do not garner any "relationship building" or any of that jazz UNTIL or unless you make yourself special to them to garner a volume relationship. 

House hacking is a great start in building your portfolio.