Hobbies have a huge range of costs. Riding bicycles can range from $100 to many thousands of dollars. Fishing can cost as little as $100 for a simple pole and a license or it can cost $50K for a boat and another $50K for the truck to pull it. Even watching TV can be really cheap or really expensive.
I think I have spent less than $20K over the course of about 5 years for a well equipped shop. At least half of that should be recoverable if I decided to sell everything. This puts my real cost at about $10K for 5 years, or around 2K per year. My future expenses are expected to be lower, since I don't plan many large power tool purchases. I consider this to be a fairly cheap hobby. It could also get really expensive if I spend $100K on a workshop.
Steve