
So far the best deal I've found for worms has been 2k for $30.00 + $13.00 shipping.http://unclejimswormfarm.com/index.php/Live-Worms/2000-Red-Wigglers-Free-Shipping/flypage.tpl.html If anyone knows of better, Please post.

I would start out with a much much lower number of worms unless you plan on using the vast majority for a compost heap or something. Red wigglers will have no problems populating your growbed once it's established. I would just go buy a cup of em from your local fishing store and call it good.. but seriously, don't add worms until you have a solid bed going.. if you do you'll have to suppliment feeding the worms with leftover veggie matter for a bit until you bed gets established. The worms will try to leave if there isn't enough food for them and nobody wants worms on their floor or worse yet starved dead worms in their growbed.. ick. start small with the worm colony, let it establish itself.
I don't know how long they will survive unless you have a very oxygen rich environment. I had standard banded nightcrawlers live for 5 days in the tank.. my DO levels are okay but with high temps it's hard to get the DO real high. What do you plan on planting? Are you going to use a seeded bio filter to help get the tank established or are you going to try to cycle the growbed on its own?
what are you going to do for bio load?