MMO Server

hello everyone, i got a quick question today and that is how would i go about renting a MMO server for my game? meaning what are the bet places to get it at and how would i set it up in unreal. i need a 1,000 or 2,000 players or more server so i need a heavy duty server to handle that many players. i am willing to put out the money i just need a good place to buy from and how to put it in my unreal game