What are the relevant metrics to measure a successful BRRRR plan?

[Luke Spooner]

Good afternoon BP! 

I'm reading more now than I ever have, trying to get myself in the best place possible to start my 1st Real Estate venture. 

My Road map is almost complete but I wanted to see what the community says about the correct metrics that I should master, to accurately measure wether a BRRRR business model for an Owner occupied Duplex is successful or not?

Is it just Cap rate, Cash on Cash return and the Equity Multiple or are their other integral parts that I'm missing?

Thanks for your help gang!