Thanks alot for your advice.
I now have two options available.
1. I have an offer from a green-screen studio (they have a balanced green-screen room with light)
2. Or i can shoot in a white studio normally used to take pictures of cars. The whole room is white, floors and everything.
I think i will go for the second one, and try to pick up on keying some other time. Really can’t afford to loose the client…
Thanks guys!