Another pro for a HELOC is not having to meet a HML's requirements for a loan (insurance, draw schedules etc....)

So we retired the sellers loan within 12 to 18 months.

However, consider STR seasonality, local regulations, and management demands, and ensure your equity loan and new primary residence costs fit comfortably within your budget.

Gradually scale by researching high-growth markets, partnering with experienced investors, and exploring financing options like SBA loans.

Minimum loan amount is $250k.

They finally get back to me after the close date to say they need more time because they are try to cross collateralize their other properties to make this deal happen and the bank they were using doesn't do this kind of loan. 

Are you using the 10% down second home occupancy loan?

you will not find a cashflowing property at 100% financing whether its with a traditional loan and heloc or whatever the terms. 

What is the minimum amount of profitability acceptable at a $60 million loan volume4.

That translates into $208 to $375 per month on a $100,000 loan.