Well yes, I did track days on many of the UK circuits . Silverstone was my nearest. Not a cheap hobby and at 11.7mpg in my M3 £100+ in fuel alone was just part of the cost! Didn't see any Muscle cars amongst some of the more expensive participants. McLaren, Ferrari along with pure track cars and hot hatches made for an interesting mix!
Live aboard dive boats and Skiing in top resorts also expensive...but worth it to me. Understand exactly what you're saying. 👍