I have a guy that will come in a few hours to discuss about an e-commerce website he wants to start his business. I've accepted to do it freelance.

Things are a little quick for my taste, but I know myself enough to know that if I don't jump head first, I'll back out and miss on an opportunity to add something valuable to my resume (and get a bit of money).

The thing is : I have nearly zero experience in 1) e-commerce websites and 2) client relationship and managing. So that will be a great challenge to me, but that's precisely what I need right now.

Anyway, I'm coming to you to ask a few questions : assuming his requirements are simple and common for an online shop, should I create it from scratch or would it be wiser to use a dedicated framework (Prestashop, Wix, etc.). If the latter, which one would you recommend, cost and efficiency-wise.

Still assuming simple and common requirements, how much time would it likely take, for an average developper (I'm no Linus Torvalds) working on average 8h a day ? More like 2-3 months, or more like 5-6 months ? I'm leaning more towards 2-3, but since I don't have experience in these kind of websites, I find a lot of user stories that might take me time to figure out.

Last but not least, what would be approximately an honest price, technical costs aside (domain, host, potential framework, etc.) for that kind of work. And for maintenance ?