Cap Rate Calculation-Always Necessary?

[Sean Grieve]

Hi All, 

At what point can one stop setting aside funds for Cap Ex? I have had a rental property for a number of years and the Cap Ex money that I've set aside is fairly significant. Obviously, the number will vary by region and property type but I imagine I should lower the monthly amount dedicated to this line item once I hit a certain number. Curious what other investors do and appreciate your feedback. 

Sean