I use
www.nurburgmotorsport.com now! Same people different name..
Storage ranges from 55euros upwards.. Thats £41 per month..
I started doing trackdays over here and then went on a trip to the ring and it completely blew my mind! You've got to go there to realise it!
We've got a completly standard Mk2 Golf GTI which is stored there. Its great fun on the ring as its not about how fast you're going, its about the experience and your experience too! I had a guy try and follow me in an Aston Martin Vantage last time and I didn't see him for dust! I know the cars are in different monetary leagues but he wasn't even close, even after saying to his mate "We'll follow him" with a cheeky grin on his face!
Flights out there range from £20 return upwards! You can get some real bargains (
http://www.youtube.com/watch?v=sB6fxk4A4m4 )
Then on top of that is car hire (from airport to ring) and hotel (about £25 upwards)
You can go out for a few days and make it as cheap or expensive as you want but I look at it as the price of a trackday in this country and the cost going the ring, I know where I'd rather go!!!!!!
It gets even cheaper if a couple of mates go in on the car too and go out there together!