Brrrr cash flowing at $200

[Mirzet Mehovic]

I'm new here, currently reading the managing rental properties book and the investing in rental properties book simultaneously. I read a lot about the BRRRR method and it seems great but I'm a little confused on the specifics.

 How much cash flow should I be looking for? I see a few people post about $100 or $200 cash flow per door and they have like 10 properties. That's all the work of managing 10 doors for only $2000 per month total. What if you get unexpected expenses or more vacancies than you anticipated and can't make all those loan payments? Is this the best method?