Interior design concepts and photorealistic mockups

We sell space saving furniture, wall beds, dining tables mainly. I would like to create 4 or 5 room scenes which reflect a contemporary and cutting edge design, but incorporate one of our products into each room.

The concepts should reflect the sort of show home style of a new condominium.

Can you give me a cost per room. Each room would be a bedroom or lounge and would be a different style. e.g. bed with desk in study room/guest room, bed with shelves in studio apartment, dining table in lounge