[Carnage]

3 months is pretty much the minimum; I have two projects for uni that need to be done over the next month or two; coupled with upgrading my own site to vb4, maintaining my mods and having time to eat and sleep. So unless your budget for this runs to 5-6 figures (at this range, I could afford to hire extra programmers to assist ), any sooner than that is probably unobtainable.

The blogs on vb.com give imo a fairly idiot proof tutorial on creating content types; the item one would be fairly easy to create. Its the order content type you'll struggle with as there is a lot less code you can use for an example and a lot more you will have to write on your own. If your PHP isn't very strong; you may struggle getting your head around how everything works, It took me a whole afternoon and i'm 3/4 of my way through a masters in computer science. So you are looking at a week or two minimum. Also, theres the issue that people who are new to programming often make serious mistakes when it comes to efficiency and security, security being quite important when it comes to a shop.

My concept for this is quite well thought through, my only real concern is quite how well the content types system would handle the order content type. If i've time over the next few days I'll have a look into this a bit more for you - I'm pretty sure I could get the shopitem content type working in no time; its the checkout/order content type that'll take the time- If that turns out to be easier than I think, I may be able to supply you with some or all of the code you'll need to do this.