How to analyze numbers in a deal

[Josh Cohen]

I am looking to purchase multi family rentals out of state, and when I analyze a property, I’m never quite sure what costs are for water, trash, Gardner’s insurance etc... is there an average cost in the nation, or is every area different? Is there an amount I could include that just covers those expenses, and if it turns out to be less I’m still covered? Thank you so much!!! JC