Convert a Template to a Website

I have a [login to view URL] site that I need work done on. The site will be used as an estimate guide used in the automotive industry. There are algorithms I need put in place to make the site work as it should. I can not do this within the wix dashboard without the necessary knowledge. You can view the site here [login to view URL]!digital-dent-guide/irlp9 How it works.. Users will have to sign up with a username and password. I've connected this with wix but I want to add a 15 day trial to it. Once the 15 days is up they will then pay. Users will create an estimate using the car diagram and the pricing and add on charges to the right of the diagram. If I click on the right front fender it should highlight, then I click on 2" dent and that will then highlight, then I choose High strength steel and it adds 50% then add to estimate. When the user clicks add to estimate it says "added" and it shows the part, the pricing and add ons that were added, plus it totals up the cost. I want the exact box that is on the site to be dynamic. So whatever is chosen will be shown on the following page once the user clicks add to estimate." It will add then the user can continue and add another car part or click complete estimate. If they complete the estimate, the part, price and add ons will be imputed into the corresponding estimate box and calculated at the bottom under total. " I want the user to be able to PRINT, or Email to the estimate to the customer. Within the user Dashboard I need the tables to be as follows. User will add their rates, if there are multiple panels chosen the user can specify a discount, the users business name, address, phone number, add a logo and an upgrade link. This upgrade will allow them full access to the site. It will be a yearly fee. Since this is a wix site there is no need for payment gateways, it's all included in the site. Please look at the site, go throught the motions and you will get a good idea of the concept and what I need to make it work.