A very complicated application (Android)

Hey to all freelancers! I want to first clear this out that this project may be a bit complicated but easy-to-do. We want to make an application for the Indian market, here's the basic run through: A person downloads the application and can register as a seller or as a buyer. For registering as a seller they would need to pay a fixed amount. After registration is done, we want to make it so they can sell "Cars" .., Note: No car payments will be going through this application. We are just going to connect the buyer to the seller. The buyer can then select an option which allows them to see the car in vr... (Not VR machines will be req.. Let me explain:) which basically turn on the camera, and places the model of the car with the color the buyer specified. The buyer can then view it via their mobile on how the car may look on their place. You will be provided with the graphics required. (Not the VR option one..) ..