Japadnik

So as I said in title I was wondering how powerful server do you need to host for example Metin2 Private Sever for maximum of 10 000 active player at the same time ? Hardware and money wise, also how much bandwidth does it needs to operate normally? I head that minecraft depending on mods installed can chew up to 1.5mbit upload per player without breaking a sweat.. is that true ? Or is it cheaper to rent some host for your server ? Also I was wondering how much money does it take to make an average OldSchool private server ? (~30 maps) (4-6 channels)(multilanguage,switchbot, etc..)