However, firms raise cash depends on the character of the business and therefore the methodology of entrepreneurship adopted.

If the tenants are paying for water on a 1-4 unit, that is a vastly different methodology used for the apartment complex owner. 

My goal is to build a portfolio using the BRRR methodology and position myself to where I can buy my own home.

Whatever underwriting methodology you are using - what does it say the thing is worth?

I'll just say that the way you carry yourself professionally or not has a lot to do with any 'miss-understandings' in regard to your vendors 'wink-wink' pricing methodologies. 

See also https://www.biggerpockets.com/forums/80/topics/291751-what-macro-data-studie-should-biggerpockets-provide-to-investors Some places, Garner included, have some skewed numbers depending on your analysis methodology.

Our methodology is B or C properties in A, B or C areas (slight value add).Key indicators we look for in our deals are (CCR = 10% or higher.....

The project pricing is certainly outdated, but the methodology still holds...https://www.biggerpockets.com/...

But be aware that there is a lot of push from some people to create a split tax roll in CA which would separate commercial property (which includes large multifamily) from residential property and strip prop 13 tax methodology from commercial properties. 

In other areas, other types of houses, different level of finishes, and different contractors, that wouldn't even get me paint and carpet.Spend some time reading other threads about how to estimate -- learning the methodology takes time and practice.