how much traffic do you have to have before your costs increase to the point of being beyond your budget?
The accounts I have offer enough bandwidth I haven't even approached that level yet...I have one retail client and one architect showing his portfolio on my reseller account for $15.95/mth.
Reselling ads is fine. If you have a developed site you can get Google ads on it easy enough. If you're going to try to charge for individual sponsors you'll have to show real traffic....and relevance so they have some chance of getting a return on what they pay you.
Maybe you should offer a CafePress or Zazzle shop selling your 3D work on t shirts or something...that way people can get something tangible too...
