Multifamily BRRRR loan question

[Chris Irvin]

I am currently reading the Multifamily Millionaire series and have a question regarding the BRRRR method. If I plan on using a cash-out refinance commercial loan (5+ units) and am going to use a mortgage broker to find the best loan, how do I get the financing lined up prior to the purchase of the property? Will the broker go out and identify the best lender prior to me looking for a property? How do I get the information about seasoning, rate, term, etc, so that I can properly run the numbers on properties? I am trying to follow the BRRRR method of building a team prior to searching for properties.

Thank you!