upto $400 for drupal site

hi, i need a workable solution for my e-commerce site (www.prankster101.com/drupal) where the emphasis is on commerce and content and to create a community.
and i just found this:
http://drupal.org/node/99428
and this:
http://drupal.org/node/199279
it talks about the need for using drupal as a cms/e-commerce solution. it also talks about the need for community.
after a little bit of soul searching, and as stated by someone in the threads, here are my options that i was considering:
A. Keep ZenCart and add Drupal
B. Start from scatch with Drupal + e-Commerce/UberCart
apparently, there is a zencart/drupal integration module. i am intrigued by this.
what i want are the following:
store: videogames, music, dvd etc but i also want a record label, fashion label
digital downloads
forum/portal/community
authorised users
cms/online magazine/blog
user generated content
i have an icarus line fansite project that i would like to "integrate"/make part of rather than have as a separate site (more details below). but depending on costs etc, i might just do this diy.
i have had some work done on my zencart site and (link above) i don't want all the work on the zencart to be wasted. as this would involve loss of money etc. but i don't know what to do. i love drupal and i hate the admin section of zencart. so i am inclined to go with option B/C. preferably B.
basically, i want a website and an e-commerce site with the added advantage of it being a portal and allowing a community to flourish. stuff like it acting like youtube/myspace where you can add videos etc would also be nice.
let me know what you think. what will be the costs and projected completion time for the site etc? can i do this by myself? i am already going to buy the new book on drupal 6 so that should come in handy.
finally, here are the band faniste details, and this is what the frontman sent me (obviously, the stuff above takes number one priority, but if we can get the above right, then the following should be REALLY easy - i can take care of the content section - but again, the ability to stream videos etc would be nice):)
"these are things i think make a good fan site...take it as you want
for the site:
complete discography...include year released and formats. also singles, comp tracks, anything else.
links to online reviews/interviews. find as much shit as you can and have it all linked. im sure some other fans would be able to help you with this.
photos. flickr/ myspace/ your own
a bio...
recent news and news archive
message board
lyrics/
exclusive music: once you get up and running i can send you some live tracks and other things that would be unavailable anywhere else. something to keep people coming to your site.
the more information you provide the more people will return to the site. if you make a it a definative resorce you will see that people will help you with content just as separate the sounds was built.
how is it all coming along?"
how much will it cost?
open source drupal can do communities really easily. so the site should be able to harness web2.0 and "wikinomics" to enhance creativity, information sharing, and, most notably, peer collaboration among users. the aim of the cms is to have features etc and user-submitted and editor-evaluated content with every news article and review having a comment section where registered users can post comments.
i also want authorised "editors" who can post etc.
from what i've read, drupal is better than slashcode/slashdot, and another site which incorporates the same ethics/"business model" as www.punknews.org
if you look at http://news.bbc.co.uk/ and http://www.play-mag.co.uk/ you see that there are a lot more articles when you go to the site. all the sites i have shown you only show a couple of articles when you go to the screen. by showing a lot more articles, i can catch the interest of more people who will be glancing at the site.
for someone who doesn't have any coding skills, i wanted to do a lot of the work myself, but have found out i can't as i don't have all the necessary knowledge. i would need help on theming and have already uploaded all the modules.

let me know. and please email me at the_az@hotmail.com

thanks