I would appreciate advice on next steps from experienced investors.

[Brandon Workman]

I currently have 2 investment properties, both single family homes. I cash flow about $700/month each. I have a good amount of equity in both as well. I really want to grow my portfolio and am thinking about doing a cash out on one of them and start brrrr'ing or perhaps just buy something bigger like a quadplex. The kicker is my interest rate is 3% on both. 

Should I sacrifice the cash flow and the great interest rate to jump start my real estate business?