BRRRR scalability questions

[Catalin B.]

While reading about the Buy Rehab Rent Refinance Repeat strategy, I come across  the following questions and maybe that someone experienced here might shed some light. On paper it looks good, but in a real life scenario projections might be different:

• -the third R, refinance could be possible if good credit and debt to income ratio are satisfactory...since many aspiring investors are far from that, what are the alternatives?
• -After reading several posts regarding the BRRRR cash flow, it seems that a $300/$400 cash flow average per month might be achievable...in order to make the effort worthy, this strategy needs to scale to many more properties (50-100+ rentals)...I am wondering how an investor can manage a bunch of rental properties scattered around a city? What if the investor expands to a different city/area? It might become a daunting task.