@Neil PolehnI would diversify and invest in 3 different states.It’s more complicated but you can “play” with cash flow VS appreciation and put your eggs in different baskets.It takes time, but are you in a rush?

There's a reason why everyone doesn't just build, it's harder and longer and more complicated.

Having a portfolio/umbrella mortgage just makes its complicated because the lien is spread of several properties. 

I remember hearing about this during a BPP but it definitely seemed complicated and I have no idea how I would even proceed with such an endeavor.

Now, that all said, this is the real world, and all the numbers are  a lot more complicated with a WHOLE lot more pluses and minuses --  loan fees, points, PITI, commissions, repairs, rental income (hopefully!)

If accounts are commingled, it gets very complicated.

There are a lot of these in places like Belize, Costa Rica, and the Caribbean Islands that are tempting but are ultimately too complicated to touch. 

The complication is I have 4 units and if I put I'll put all 4 together.

Both of these seem like ways to make a straightforward deal exponentially more complicated. 

But the stronger legal protection you want, the more complicated and expensive it gets.