50% rule apply if real estate taxes high?

[Peter Fokas]

In Northern NJ the real estate taxes are quite high so was wondering if the 50% rule makes sense in this case or should we separate out the real estate taxes separately when doing analysis? For example saw a 3 family home with 14k in taxes. If one were to separate taxes out of the 50% what would be a good rule of them to use for expense percentage (not including taxes). 30%, 40%?