Software to manage real estate portfolio

[Justin Brown]

Anyone have a good system to manage a portfolio of properties ?

I have 40 doors mostly out of state 

2 airbnbs 

3 brrrs/ fix and flips in process

I have a new personal assistant starting tomorrow and have google sheets and box currently for all the documents and to list out all the properties, utility companies , property managers, contractors, maintenance contacts, password/ log ins, etc

But wanted to see if anyone has something that’s more efficient ?