CapEx Estimates and Savings

[Ryan Swift]

I've been reading Frank Gallinelli's book on cash flow and determined my method of budgeting is, well pretty much nonexistent. So I've been working hard to change that. I have 2 questions for you guys. Do my CapEx estimations look realistic? And should I cap how much I save towards CapEx, like if I have 10k or 15k socked away for 5 SFRs would that be enough? Or would I save indefinitely expecting that I will eventually need that money?

These are based on 100-150k SFRs in the Irving, TX area (Dallas County).