with this kind of thing, is Garry's mod really necessary to be thrown in?
Also, how would you handle plugins/server management and version control?
Fundamentally, it would be better to create server resources and completed packages. Question is, how is it going to work? are people going to buy a Minecraft hosting deal and give you Cpanel Access? or what if the server is a Linux VPS? do you have experience on how to make that fool proof for clients if your goal is to make it easy for server owners?