Which financing is best when implementing the BRRRR strategy? Why?

Whatever works for you @Latoya R Dixon ! Do you have equity in another property that you can use to purchase the BRRRR property cash or as a down payment? If so, a HELOC is a great option as it is there and available until you need to use it. If you have OPM and you are obtaining equity as the non-money partner and operater of the asset, then that is great too. It depends on what you have available yourself and if you want or need a partner. If you'd like to finance conventionally, that works too, but you'll have to wait a little longer for the seasoning period unless you refinance with a portfolio lender. There is no "Best" option - rather the one that fits your risk profile, goals and strategy is best.

@Joseph Firmin thanks so much. Makes lots of sense. Easily explained

You bet. Let me know if I can help further!