@Gerardo Gutierrez the key to getting the most advantage out of the BRRRR strategy is to budget your remodel. You'll need to work this strategy backwards to figure out what your repair budget is. This will then assist you in determining whether or not the property is a good deal. Let's look at an example:
You find a property to purchase for $60,000
You determine through comparative market analysis that this property has an after repair value (ARV) of $110,000
You shop loans and find a local bank that will lend you on 80% loan to value (LTV)
You bring in your contractor and determine that the property requires $25,000 worth of repairs in order to be habitable
Your budget is determined as follows:
$110,000 (ARV) x 80% = $88,000 (the total that the bank with refinance
$88,000 - $60,000 (purchase price) = $28,000 left for repairs
As you can see, there really is no "secret" to maximizing the BRRRR strategy. It really all boils down to good estimating and simple math. Now there are always extra expenses such as appraisals, inspections, closing, etc which you'll need to take into account. Fortunately these are usually known amounts that can be found out by speaking with your loan officer. Don't be afraid to shop around to different banks to discover what loan products are out there. I hope this answers your question.