Hiya, I reckon £4000 would get you a chinese 1200x1200x100 machine complete with computer and ready to go, but a 2400x1200 machine might be a bit more due to the size/freight.....

I origionally started out wanting to build a machine 3mt x 1mt a couple of years ago, eventually I went down the import route as it was so much easier :s Although I ended up with a 1200x1200, hehe.

If you wanted to check the quality etc you are most welcome to come and see/use mine