Website development

Need to build a ecommerce website with the following on a high level:
1. Users can create an account to view, or view+buy or view+buy+sell a certain collectible product based on a subscription model
2. Users can upload pictures and description etc of their products for others to view/buy
3. Users can trade products too(like exchange) and create wishlist.
4. A way for users to interact possibly moderated by admin
5. Payment integration
6. A few static pages whose content can change once a while.
7. Responsive website
8. Performance is the key as all other competitors have shut down due to performance issues.
9. Collaborative project with inputs from the US and the UK.
10. Time frame : 4-6 weeks.
11. Account with hosting provider will be provided.
12. WordPress or any similar. But we need someone who is a full stack dev.
13. We are open to ideas and flexible with the technology to be used.

More details can be discussed at a later stage