We opened a HELOC in April that we plan on using for funding (either down payment or full). 

Not only that, but you have to find a lender that will provide a loan on ARV and not 70%-80% of what you have put in or the appraised value.A HELOC allows you to go the cash route, obtain a HELOC and use the cash again to buy the next property. 

They are all going to be fully rented out and I don't plan on selling them. 80k of HELOC is available to me from one of them. 

HELOC?

At that point, you can HELOC instead. 

@James Bridges, if you have any equity in your other property, you could talk to a bank about a home equity line of credit (HELOC) or you could look for a higher balance credit card with no interest for your first year and pay that balance off before the year is up.

I was given issues trying to pull a HELOC on my SFR after rehab because of "mortgage seasoning"I purchased this SFR with conventional 80% loan.After rehab, I still was able to pull 36k HELOC with a 6.0% rate.

I'm interested in using a HELOC on my primary residence to purchase a rental property.

One option is to partner up with a great GC or developer.Personally, I'd do a HELOC and try to make sure the deal will pencil out to where I could reclaim that capital within a year or two. 

We used the equity to get a HELOC to make a downpayment for another investment property(was primary home and we househack out of it).