Dani,
In retrospect, we had a very similar situation to yours a few years ago: we had a brand new HELOC with a $180,000 limit. Newberg is less expensive that Portland, thank goodness, but still a fairly pricey market. We bought a single family house, then another, then two duplexes and a four plex over the course of about 2.5 years. We never maxed out the HELOC, so we always felt we had plenty of reserves (on top of our reserves) and tried to whittle down the HELOC while we were between deals.
We didn't close any deals in 2015 except 1 cash out refinance of our first purchase, which worked great, and several attempts of a cash out refinance of our second purchase, without success. We are pending now on a duplex here in Newberg, which should meet the 1% rule (our goal as well). All of our deals have been MLS listings that we had our offer in within 24-48 hours of listing.
So I suppose my advice would be to try for several small deals rather than one big one that took all your cash.
Good luck and let us know what you decide,
Evan