I live in California and I'm trying to be very careful to do the appropriate thing. 

You could/should make your last exchange in to a state with no state income tax and make sure you also live in a no state income tax state when you sell that final large property.

I live in West Chester as well! 

Squatters USED to be able to break in and live for 30 days and have tenants rights.

I live in one of the apartment units too. 

Or, you can buy in an area where incomes are higher, crime is lower, and more qualified buyers want to live there, but then the cosmetic upgrades leave no margin (almost every owner-occupant is willing to repaint and refinish floors over time).  

At the time, she was living and working full time in Switzerland.

I reiterated on the appeal and commissioners application that I live right upstairs, in the 1st unit and the response in the appeal was that because I indicated the unit for which I’m applying wasn’t my primary residence, it didn’t qualify.

We currently live in New Jersey.

Outside of real estate, I enjoy spending quality time with family, working out, getting active outside and listening to Bigger Pockets :)Excited to learn and connect with you all!