I highly recommend preparing a rendering manual that contains information about the project and all the specific details that need to appear in the renderings. You can also tell me where I can get creative.
The images that you will receive are rendered at approx 5000x3000 pixels and you can print it in large formats.
Each project is is about teamwork with the client. A good communication results in good images.
There are lots of project parameters that can define the amount of hours invested in each image such as additional modeling, the number of images, specific details etc. This is why I prefer to make a quotation on each project alone.