Line of Credit We Can Use As Gap Funding?

Hello, 

Can anyone recommend a broker or a direct lender that I could get a large line of credit from to fund the down payments + closing costs on turnkey investment properties? Ideally, this line of credit would be structured at a set interest rate with interest only payments for a period of 60 months. (This allows us time to raise rents plus appreciation over 5 years to then do a portfolio refinance to pay back the line of credit). 

It needs to be a line of credit and no other type of "one-off" funding for each deal. I've found one company/broker that is working on getting us funded now, but I just wanted to reach out to more brokers or direct lenders in the meantime. 

Thank you very much!