Bryan says he 18, he should be feeling the way he does. When I was 18 I wouldn't think twice about tearing apart anything. I can remember getting thrown out of an apartment because we were rebuilding an engine on a Honda motor cycle in the kitchen. When I had young children I did a lot of my repairs on my cars. As we age you can't do things that you could do when you were younger. Here's an example laying on your back under a car you cant' get far enouigh away to see what you are working on. Another example is how much flexiblity and mobility we lose, when I was 18 I had a 32" waist now its 38".
Some people have jobs that require clean hands, you can't go to meetings with grease on your hands. These jobs are more professional and usually pay well, they create disposable income and those funds are used for hobbies. Some guy like boats, some like planes, see how fast your money goes with those hobbies.
There's room for everybody in this hobby, 30 years from now when Bryan is living on 20 acres and in his workshop he has 20 vintage Pontiacs valued at $15,000,000. He'll be singing a different tune.