Building a product comparison plugin

I’m trying to create/build a product comparison plugin for wordpress. Here is a screenshot of the design of what it looks like.

Markup is simple and i’m just worried about creating the functionality since i’m not a back-end developer. How hard would it be in creating this plugin? If it will take too long do you have any ides of a similar plugins close to the screenshot. I have tried compare but it is very limited since i need to pay for the full version.

It would great if i can get a tutorial at least that would get me started on how i can build it.