An RPG medieval multiplayer game development

I'm looking to make an isometric game, An RPG medieval multiplayer game that allows players to form or create their villages/kingdoms through interactions with other players in the game. Players can own assets such as factories/ bakeries/ horse breeding companies/ mercenaries. My point is that players can own in-game assets as well as interact with other players by forming alliances/ frenemies/ enemies...I'm also open to ideas, if you have any.