android games

Hello. I would like to know if you can create an MMO game in which I have no commercials, just to be able to buy various things in the game (chests, crystals or anything else). The game must be online and in which players can communicate via chat. To be more specific, I would like to give the game "Million Lord" as an example and of course I would like to receive more information about how it can be played and how much this whole activity would cost me. Thanks !