Revisions of Custom Plugin Based on Inventory API

I have a custom plugin based on a REST API that provides access to information on make, model, build year, and sales price of current inventory. I need shortcodes expanded that can pull based on make. I also need the current search form and inventory display revised in Wordpress website - similar to a used cars for sale site that has search form and display - . Will have a similar search and display like: https://www.carmax.com/search#BT=0&Distance=250&ExposedCategories=249+250+1001+1000+265+999+772&ExposedDimensions=249+250+1001+1000+265+999+772&Page=1&PerPage=20&SortKey=0&Zip=11580 but with a lot less fields For search will need: 1-Make 2- Size 3-Price: Min Price - Max Price 4- Year: From To 5- Used/New (check box) Needs to be completed ASAP.