Best way to finance flip/BRRRR project

[Ohm Apiwat]

All, 

I'm pretty new to the flip side of the business and already have a few rentals in place. What's the best way to finance any flip projects or even (BRRRR)?

Own money, Hard money, Personal line of credit, Heloc? 

I already have Heloc in place for a certain amount, should I use hard money which has more interest but less risk to my property? I'm working on getting a line of credit at 5% as well. Basically If I have all that in place, i don't need hard money? it seems lots of people in the forum are discussing about hard money. Thanks. I have many questions.