Shopify Website Development - Product Variant Custom Build

We are looking to find someone that will be able to build custom features on our Shopify website - we have the background but do not have the time. I will try to explain the job in full detail and am happy to provide any clarification or answer any question. Our first project is we would like to build out product variants to replicate a product variant that is seen on www.petunia.com. Note - a variant is a different pattern within the same product style. Example - style is boxy and the variants are stripe pattern vs polka dot pattern. We would like three things: 1) the product variants to show on the catalogue page as images. This is seen on this example:[login to view URL] 2) within the product page we would like these same product variants to show as images -[login to view URL] When one of the variants is selected we would like it to switch out all the images to the pattern variant that is selected. In our current theme it will only show one image of the new variant selected and it keeps the old images visible. 3) We would like to upload different pictures AND video for different variants. Please let us know what your budget would be and the timeline you can provide the work. Best regards P