Apply for HELOC now for future investing?

[Kevin King]

So, I have a duplex that has about $150,000 in equity and I am starting to think about purchasing my next investment property. 

Ideally I'd take $20-$30k out with a HELOC to fund my next downpayment. I hear that getting approved for a HELOC can take some time, so my question is should I start looking now if I plan to invest in the next 6-12 months? My timeline isn't absolute, but I do want to be ready as the market seems to be shifting in our favor.

And, my duplex is in Riverside county in socal, does anyone have any recommendations on where to apply for a HELOC?

Thanks!