http://www.nuerburgring.de/en.htmlYou buy per lap at 22 Euros per lap for a single lap, or increasing numbers of tickets, the more you buy the less you pay.... just remember each lap's 12.9miles long.
Martin Bird runs Burgstube hotel is about 1/4mile from the track entrance.
http://www.burgstube.com/ - +40 Euros per night per person.
May also be able to do a deal on track tickets.
If you fancy more of an 'experience' stay at Bren's place in Dollendorf (20km from track entrance):
http://www.slidersguesthouse.com/(it's a *bit* bike-oriented, but Bren's a top guy and a great host.... two of the fastest guys ever on the track run it, too)
Brens is 30-something Euros a night per person, plus 4Euros for cooked breakfast..... and he sells Oettinger beer
. You'll need to have your evening meal elsewhere though (same as Martin's most evenings).
Pinnochios for pizza in Adenau - under 10 Euros
Pistenklaus in Nurburg for steak - over 25 Euros
Make time for spectating, as it's very much worth it and great fun. You will also learn a lot about the track. Also driving there, turn off at Eupen and pick up the 258 - it's a f*cking great drive to the place.