From a technical perspective, you're probably not breaking new ground here. The main things you'll need are ease-of-use and good marketing. There are existing companies that do this and make it fairly easy to get up and running, so you'll need to do the same. Perhaps start with a niche (e.g. easy setup on Ubuntu) and build from there. Still, your biggest hurdle is going to be that no one has heard of you, so make sure that you have a well designed landing page and think about who you'll market the product to.