Which Type of Financing for Building Out a New Unit

[Matt J.]

Hey everybody, I have a triplex in Duluth that is doing well for me, but we have a 4th room in the building that already has an egress window and a lot of things roughed in. I'm looking to convert it into a 4th unit, an efficiency unit, to take my triplex and turn it into a fourplex. My question is, which type of financing makes the most sense? It's looking like it will run me 10-15K. Some background, I do have quite a bit of equity built into my primary residence, so I was toying with the idea of taking a HELOC out against that, but I'd love to hear what others advice may be.

Thanks so much! 

Matt