Bathroom Suite Render from 3D models

Hi, We are an online retailer and are looking for a bathroom render which has our products placed in. The pictures and 3D files (igs, dwg & max) of the products are available (check attached). The job is to create a Bathroom render which will show as if the 3 products (toilet, basin and shower enclosure with tray) are fitted in a real bathroom, therefore a high quality photo realistic image is required. Large Square image (3000x3000 px or more) is required, once the main image is finished, we may ask to take out zoomed-in shot or where possible slightly different angle shot, from the finished image. Please see pictures and files of the products attached along with some examples of the final outcome. We have requirement for many similar images and its regular work, so this render is like a sample to decide. Thanks Ashar