You've already spent the money, which isn't bad because you actually own the machinery itself.
That having been said, perhaps it would have been more economical to initially get a VPS w/WHM/cPanel so you could simply launch reseller accounts and accounts for regular users with a click or two of the mouse.
Also, you might want to look into that anyway - you can get VPS accounts for as little as 5 bucks a month (less than that even), and you can practice building and breaking your service until you know how not to break it
