Zero To Hero

Ok guys, I was thinking...
I wanted to start a server business (selling VPS/shared Minecraft hosting) for EXTREMELY cheap. By which I mean for you guys, not me. Granted, I will still get about %5 profit. I was thinking about 512 MiB of DEDICATED RAM for a total of $8.
I was also thinking about slot based hosting. Essentially, you get unlimited system resources, but only get so many slots (People on the server at once). So, for example, $6 for 5 slots, with each additional slot 60 cents each. What are your opinions on that?
Finally, Shared or VPS? I know that is a bit over a few of your heads, but what it is is this:
http://en.wikipedia.org/wiki/Virtual_private_server and
http://en.wikipedia.org/wiki/Shared_web_hosting_service
After reading skimming these links, should I sell "System Administrator" and dedicated IP address privileges for a bit more than others? It would boil down to (VPS) $8 per 512 MiB vs. (Shared) $6 per 512 MiB. So what should I do? Granted, you can set up a bazillion and one things on a VPS, whereas Shared can only do 2-3 things. I was just wondering about your opinion: Features vs. Price?
That's it, PLEASE respond with your feedback! I would love to hear from the heart of the Minecraft community itself! :-)