HELOC for paying down commercial investment mortgage?

[Wade Barnes]

So I've been reading about using a HELOC like a checking account to pay-down property mortgages. If this is a new idea to you, consider reading about it here: https://www.replaceyourmortgage.com/  (I'm not affiliated with this company) 

But they opened my eyes to the concept, and I believe it's a good thing to do. However, I'm looking for a direct lender to setup the HELOC loan rather than use a middle man. What wisdom can you share?