How to estimate expenses?

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Hi all, 

(Hint acceded: I've just started my RE journey). After reading a few books/BP-browsing, I've decided to practice analysing real properties. However, I'm stuck on estimating expenses. I understand what is involved in total expenses (courtesy of Frank Gallinelli) and have come across the 50% rule, but I would prefer estimated breakdowns of each expense. From a brief scan on BP, it seems that I can find this information by asking property managers, calling up utility companies, asking seller's agents, etc. However, since I am currently based in London, UK and would like to analyse houses in Canada, these methods aren't feasible to me. How can I estimate individual expenses using the internet alone? 

Thanks in advance!