You would need cash reserves for every property that you own so you will still have to have money saved up for these reserves. 

To get to this number, I take 35% from the gross rents for vacancy, management fee, repairs and capital reserves (repairs that will be later), less the principal, interest, property tax and insurance. 

To meet Reserve Requirements to qualify Most loan programs require a certain amount of reserves (money left in the bank after closing).

Definitions will vary, but when it comes to apartments, some general rules of thumb:Property TypesClass A: Built within the last decade OR older property that has been very nicely renovated/well-maintained and is located in popular neighborhoodLots of amenities (doorman, security system, washer/dryer inside the apartment units, stainless steel kitchen appliances, on-site gym, doggy park, package room, reserved parking, etc.) 

I also think your reserves are way too low...

We save about $50,000+ in addition to above and invest in taxable (small amount) or keep cash reserves.

No.Really, blockchain is only a threat to banks, and cryptocurrency is only a threat to the Federal Reserve.

There are very few good deals around and it's easy to miss expenses on small multi-family (most people under-estimate reserve accounts, maintenance, eviction costs, other legal fees, city licensing and inspection fees, accounting fees). 

As long as you have everything lined up: Your financing, contractor, refinancing plan, reserves, and you know how to analyze the deal then go for it.  

Is the Replacement reserves line where you account for CapEx?