Ready to scale

I'm ready to scale up from 2 SFH's near Joliet. I executed a successful BRRRR on the first which allowed me to buy the second. I've raised private funding and am actively looking at 4 unit buildings anywhere between Joliet and Chicago.

For those who made the jump to multi family - what was the hardest lesson you had to learn. 

I'm a licensed agent and for anyone with small multi family properties nearby Joliet - I can execute on a deal quite quickly.