Drawing equity in main home to invest passively

[Tony Lin]

I have a good amount of equity in my primary residence that I'm thinking about leveraging for passive investments in syndicated deals. Right now I have ~75% equity available to draw. Mortgage payments are pretty low and I'm comfortable drawing another 25% equity to invest with. That would be 50% equity remaining in the property and more or less doubling my mortgage payment. 

What type of loan would be best for passive investments? I'm thinking of doing HELOC since I can pull money in and out as they're invested in funds, then pay down the line as the principal is refi'ed out of the deal. A second line is stable rate but there's a high chance I'm paying for funds that I haven't actively invested in.