Hello, I an a professional CG artist working in the commercial field for 4 years now. I have a vast experience of product photo-realistic rendering and lighting. You can check out my portfolio and you tube channel. Given a chance will not disappoint you.
Since you have not specified the timeline, deadline, resolution etc., we can negotiate the cost and milestones.
Also I can see you are from India and I am working from Mumbai city! So there should be no problem in communication.
The basics, If we will need to do the 3D modelling, I will do the modelling after you have submitted sufficient blueprint (autocad etc.), or If you have the 3D models ready, after you have provided me the correct 3D model, I will give you the still from the angles of your choice in a grayscale (no colors) preview. And after your approval the best camera angles, I will submit to you the final rendered product in the resolution of your choice!
As you have specified I can do and show you one piece and after that you can release the 1st milestone and we will begin with the rest of the pieces.
Thank you and all the best!