How do you estimate regular expenses on multifamily properties?

[Ben Feder]

When buying MF (residential and commercial), how do you estimate utility costs, capital expenditures, etc. before you even know the market prices? Or how do you find out the market prices for these different expenditures?

I am interested in learning how to estimate rehab costs, but that's besides what I'm asking about other, regular expenses that occur month after month; not just the one-time fixing/rehab costs?