A company who specialises in artificial grass seems like just what you need. You have no need of waiting for your lawn to grow.

I've just recently bought a house with a lawn that was attrocious. I'm not one for regular mowing or watering of grass, so i decided to purchase some. To my amasement it is probably the best looking thing i have ever seen. AND.... it looks real.

http://www.asgoodasgrass.co.uk/gallery.php