some good reading
http://nurburgring.org.uk/
http://nurburgring.org.uk/insurance.php
for a weekend it round 400 - 500 quid in food fuel and accomodation.
you dont need any extra tyres just make sure you go with fully working brakes, suspension and tyres.
track insurance i think is round 200 if you can find a place that will insure you, your normal car insurance wont cover the nurburgring.
i will post up some b&b's that may be options we will go for that are close to the track.
list so far
Matt + 1 (golf gti)
Ant + wife (e46 m3)
Allun - Ants mate - (kawasaki ninja)