Many partnerships often do a 50/50 spilt - one party supplies funds, the other all the work.More sophisticated arrangements, like syndications, trend to 80/20 or even 90/10.You're situation is more complicated as you'll be living in one of the units.

The process can be overwhelming, but it's not really complicated when you break everything down into baby steps. 

I'm working on investing in Phoenix (just because I'm getting started again after years, so I don't want to complicate things by going long-distance).

If it was there are some other complications.

I have a pretty complicated structure...

Keep things simple and don't overthink it or unnecessarily complicate things.

He did have diplomatic immunity which complicates the issue, but I’d still make sure you can get loans.

I agree with it all, especially that it really is a simple thing, and to not over complicate it.

I wouldn't complicate an easy process by including the builder in the ownership. 

Sometimes I make things more complicated in my brain and its nice for someone to help bring me back to level and think things logically. :)