Starting out in REI with 50k

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I finally have 50k put aside to begin my real estate investing journey. I have an intermediate understanding of RE and economics, but I'm quickly learning that 50k is not a whole lot to start with. In my opinion, buying one house, rehabbing it, renting it, refinancing it, and doing it all over again, is not a very efficient way to scale, especially for the amount of risk involved with this strategy. Side note: According to many Game Theory principles, once a strategy has become too popular, there is little to no arbitrage left to be had, considering risk. This conclusion has led me to turn my focus to commercial residential investing. 

Question 1: Am I wrong about the BRRRR strategy?

Question 2: Should I go back underground and save more money before getting into commercial RE? 

Thank you all in advance,

-Blake "Blezus" Reynolds