What expenses should I factor in for a rental purchase?

[Marty Gold]

I want to make an excel spreadsheet to help me compare properties.  I know BP offers a calculator but I like using excel. 

So far I'm factoring in:

Purchase price, mortgage, closing costs, rehab, taxes.  

Also utilities like Electric, Water, Garbage, insurance, other ecepenses, including vacancy & CapEx.

And of course, income. 

What am I missing (most importantly on the expenses side) that I need to consider when deciding if a deal is a good rental purchase or not?

Thank you.