How long before refinancing apartment complex?

[Johnathan Norman]

I purchased a small apartment complex all cash at a nice discount about a month ago with an empty unit and all tenants on a month to month lease. The new unit is leased at a higher rate and i'm on track to raise rents in half the apartments in the next 3 months.  

I love the idea of taking some money out and doing another all cash deal soon. How long do banks typically want you to wait before doing a cash out refi on commercial deals?