HELOC on multi-family investment property

[Rickey Wiley]

I'm needing help funding my next investment property. I currently own 3 properties (all duplexes). I don't have much equity in my primary residence, but I have est. 100k in one of the duplexes I own. Are there any banks that will allow me to do a heloc for a duplex as an investment property? I only buy small multi-family and at this point my issue is getting the financing for the next property. If that isn't possible what is the best option for me? I'd love any advice