Hi Harry -- this site looks great, and it's almost exactly what I've got in mind for a project I've been mulling over for a long time (a very different industry, but a similar platform). I've been looking around for the platform, and like yourself, I think I've settled on drupal/ubercart/marketplace as the best fit.

I'm sure I'll have a few more questions at some point down the road, but my initial one is: roughly how long did it take you to build? As a newbie I'm trying to get a sense of the learning curve involved before diving right in.

Thanks!

-Jonas