Refinance after BRRR method?

[Lee Haenschen]

I haven't quite got things figured out enough to buy my first rental property.  So far the department I have the least confidence in is the finance side. IF I get a hard money loan to get me & my wife started into the rental business and it's time to refinance to get a lower interest rate and pay off the hard money loan before the deadline. What direction do you go from there? If I want to keep my personal credit out of this new business venture, what options do I have? From all my reading there is a limit to how many homes you can buy on personal credit before your debt to income is tapped out. If I want to have 200 rental homes one day, I'm sure ill need a different type of loan to achieve this then a conventional mortgage tied to my personal credit? 

I realize this might not be as important when doing the first deal, but I definitely don't want to get started by heading down a path immediately out of the gate.