Plenty of people in the e-liquid market who do just that. One of my favourites, that's become pretty successful:
Hello and welcome to | Grant's Vanilla Custard
Raw materials I've already added up. Bottles, just had a look on ebay, £250 for 1000 100ml ones. Packaging, generally not a lot. I've yet to receive an eliquid that's been anything other than the bottle in a padded envelope.
Design doesn't need to be much, again, haven't seen much in this regard, all very very simple, could be done by an amateur in 5 minutes in photoshop. If you wanted something that would kick everyone else's asses, an extra $200 on top of the web design, plus maybe some very minor edits in photoshop would be fine. Printing, just measured the label on a nearby 100ml bottle, 160mm x 50mm, so ~£40 for 1000 labels.
Promotions, sure, I understand you can't put a static value on those, but overall, all those costs added up are somewhere around $2800 (guesstimating currency conversion roughly), which leaves $7.2k for promotions and miscellaneous expenses in the space of the first three weeks. Bottling shouldn't be too much of a problem at this stage and with those margins. All costs for anything physical are based on the cost of buying from eBay, if you went through the normal channels, obviously they'd be lower.
It shouldn't take more than 2 minutes to fill and label a bottle, perhaps a little more if you're adding foil (not sure what the process is for that).