I have yet to be turned down for a credit card.  

We allow Tenant Portal (ACH), Direct Deposit to our bank, Venmo, Strip (credit & debit cards) and old-fashioned mailing of checks. 

That also means that we can start building business credit, which does not report on our personal FICO scores.  

@Natasha Rooney rates will also be different depending on if you have Credit or not.

To qualify for debt, lenders generally look at net worth (aim for the loan amount), liquidity (10% post-close), experience, and a solid credit score (ideally 680+).

Also, be aware that if you are thinking of doing a BRRRR that maxing out your HELOC can have a negative impact on your credit score so when you go to do the refi you may potentially run into issues.

Did you find a good credit screening agency?

Portfolio loans, asset-based lenders, and home equity lines of credit are all alternatives to traditional borrowing.

this is old  tried and true method of simply having you pay them to get credit cards .. there is no need to pay for this service.. unless you want to of course.. there is no magic bullet ut there that is going to give you credit and financing unless you actually qualify for it.But zero interest credit cards are used by some to do rehab and then pay them off issue is though your fico score drops like a rock the second you take on all these CC.Also starting out there is zero chance of getting any kind of business line of Credit that is unsecured.

They operate like a credit card - when you are not using the money you don’t accumulate interest, when you are using the money you accumulate interest and need to make monthly payments.