Artwork for Video Game

I am in need of some artwork for a video game I am working on. I will be needing 20 different drawings of a room. The background of the room will be the same in all the drawings. But the objects in the room will be different. You will also have the option to be creative with these drawings, as far as whats in the room. This game is for Android/iPhone, but I don't have a very big budget for this game, so price of the bid will be a factor in my decision. I look forward to your bids and I will try my best to answer any questions you may have, But I don't want to get into any more detail of what the game includes without signing a NDA. What I can say is, the game is PG rated. So it won't be anything gross or sexual.