Custom Minecraft Server/client software

Currently I am starting a Massive Hunger Games Online Minecraft Server (over 100 servers expected). We as a company are looking to expand are sevices and dive into a new area and create our own server client software. why? Minecraft is not multithread and no known software hooks into the API of minecraft directly enabling me or you to right plugins that directly change the game for the user. Minecraft also is not able to handle large servers as it becomes unstable when it uses large amounts of ram. So I am looking for an experet that I will consider hiring later to help devlope this project. I would like to hire some one to build somthing along the lines of this type of minecraft server software [login to view URL] I require any counters to be able to work many hours in a week once we go through with it. Please P.M me with any information