Optimising Minigame Network

Hey,

I am starting a minigames server and would like to have my server ran in the following way:

I want to have it so that there are a certain amount of servers for each game mode, but if they're not all needed, they are offline. There would be always one in queuing mode and when it leaves that another one starts up.

I know his is possible, but any ideas on how I would go about doing this?

Thanks,

Enderqura!