Best lenders for a 1st Lien HELOC for a $550k home purchase

[James Johnson]

I am purchasing a New Construction home in South Florida that will be complete in August 2019. I have already been pre-approved for a Conventional 30 year Jumbo Mortgage but I am looking to attack and pay off this home quickly. I recently came across several "speed equity" articles that share getting a HELOC in 1st Lien in lieu of the Conventional Mortgage. I am trying to find a lender that can do the higher amount, most lenders do a max of $500k. Please share if you know of any lenders.

Thanks