You and your wife are considering a move to be closer to her parents in Scottsdale.The largest source of liquidity for you is the equity in your home at 1M and you have a 4% mortgage and it will cashflow positive if you rent your home in Seattle.Your question is should your sell your house in Seattle or rent it. 

I would keep as much liquid as possible and essentially get you to 20% equity or more by renovating the property. 

She just doesn't have the liquidity to help me.

Will you act as KP in my deals, offering your balance sheet and liquidity to help me secure a deal?

His roadmap for retirement is $500k liquid assets, paid off primary home, and more than 1 income source (real estate, part time job, social security if old enough, etc.).

I am still rather new in the investing world, but I know with enough base knowledge and liquid capital of course, I'd be willing to pursue it for sure. 

The high end is the 20 or so co ops on 5th Avenue or Park Ave (one is on East End Avenue) that require liquid assets of $100 million + to gain board approval.  

Two of the biggest challenges I face are that I’m not very liquid at the moment, and the Seattle area is extremely expensive.

It's tempting early on to leverage as much as you can so you can do more deals and keep liquidity, but increased cashflow especially with PMI will make you sleep a lot better at night.

This one was strange because I ended up splitting the companies and partners involved in the deal so we liquidated halfway through the project.