Nagan-4
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Hello. I've detailed everything in the thread about the CIS championship in the Heroes 3 section.
Right now, the internet is acting up, so I can't provide the link. If you can't find it, I'll do it tomorrow.
As for the expenses, for 4 days, you'll need around 3300 for accommodation, and you can eat for about 150 rubles per day (without vodka and cognac, though). A ticket to Moscow costs 550-600 rubles.