Develop a specific feature for my bigcommerce store, and possible make it into an app for their marketplace.

I need a certain feature on my product pages similar to add to cart button. -I need to be able to enable this feature only on certain products, not all of them. -When customer uses this feature I need it to present a small form and once form is submitted admin must be notified and given the chance to respond. -There are certain things that must be automated via rules of some sort, that automatically responds to the customer if a minimum criteria in the from that was submitted is not met. -This minimum criteria needs to be different on all products and easily adjustable by sites admin. -If approved by site's admin, a url must be created and sent to the customer. -This url needs to be some sort of link to a checkout, containing the product the customer specified in the form. -The url must only be valid for things that were specified in the form, and if any changes from things specified in the submitted form are made, the link would become invalid. I would prefer to only discuss details with candidates who actually think they can do this and do it properly. *Please do not bid on this unless you think you are able to do this - there will be more details given privately to those interested*