Should I use HELOC to start fix and flipping?

[Luke Diem]

I am currently looking at a duplex to start house hacking. I would be looking to get it at a low enough price, along with the home improvements done after purchase (also with 15%-20% down) to take out a home equity line of credit. I would use that line of credit for the rehab on my first fix and flip. My end goal is to have a large portfolio of buy and hold rentals for a nice passive income. In order to get to that point I think I need to start by fix and flipping to raise enough capital to buy more than just one rental home. My question is, does this sound like a good idea? Or are there some issues I may be looking over? I am very new to RE investing and am looking to get started very soon. Any and all help would be greatly appreciated. Thank you in advance!