Long Tern Buy & Hold Strategy

[Brian M.]

I am new to investing and plan on buying my first residential multi family property late this year. I am 23 and want to build a portfolio using a long term buy and hold strategy. By year 30, the majority of my investment properties will be paid off, I will take equity out of the properties if needed and will pass my portfolio to my future family. 

With a long term buy and hold strategy: does having a negative CoC return matter if the 5 year annualized return is approximately 15%, 30 year is approximately 10% and there is significant net cash flow starting in year 20?