Many people are actually cash out refinancing and LOOSING the great interest rates they have on their 1st mortgage.

If you own cash, then you will probably have to get a loan to buy out the other person (most people don't have hundreds of thousands of dollars sitting around to buy someone out). 

Are you cash flowing the property?

Your best bet is to keep liquid cash and avoid PMI.

If a cash for  keys is given then how does the next landlord know if they are getting a bad tenant.  

The way I'm looking at it, if my spouse and I only do employer matching for the 10 years we would have more than enough in there and still 10 years out from being able to access it.I do plan on doing 401k loans for deals if the numbers check out, and I've considered rolling over some of our 401ks into roth IRAs to access our contributions but we'd have to pay taxes out of pocket (a big hit to cash flow) and we couldn't touch it for 5 years.  

In reality this strategy still works, but we are having to leave more of our own money in the deal because prices are high and/or rent won’t justify maxing the cash out refinance because interest rate is high.

I've worked with several lenders that allow no cash-out seasoning before.

Yep, then you will probably need to move the cash.  

Quote from @Adam Ortiz: Hey everyone,My biggest dream is to own my own property, and start developing some cash flow.