The reality is that so many people have hobbies that require serious know how or high levels of talent that they could easily market their hobby into becoming a profitable thing.
While it may or may not become a full time business venture, you can at least make a few bucks on the side simply advising others who are wanting to get started in the hobby you are an expert in.
From model trains to fly fishing, you could be the guru of your field, and help others achieve that guru status someday.
You may be the guy who loves to do wood work, and you might be able to sell that handmade wood strip canoe you made for a good amount of cash.
You may even post up a little website and take orders for building custom ones later on.
This kind of stuff goes on all the time, from custom bird houses to clothing for dolls, you never know what will sell to those who do not have the same talents as you.
If you know how to play an instrument or can tap dance, you can make money now giving lessons to those interested in the same talent.
Knowing how to do things is always marketable, and the more popular your talent or skill is, the more potential money you can bring in from teaching that skill.
Never under estimate how many people might want to learn how to paint, ballet dance, or rebuild an engine.
In today's times you have a great potential to make money now selling your knowledge as more and more people are trying to save money in the long term by gaining skills to fix or build their own things instead of having to hire professionals every time they need repairs.
You can help these folks out with your expertise and also make a few dollars along the way.
With the current climate making every dollar something to spend wisely, shelling out a few dollars now to save a lot later is worth it for most people.
They understand that money is at a premium these days and you could be the beneficiary of this philosophy as time goes on.