I'm thinking about dipping my toes into this world by building a shed. As David Lynch said:
"Whenever you can build a shed, you've got it made"
"I'm a shed builder. If I was just left alone, I would build sheds. I would plan them at Bob's Big Boy Coffee Shop, and I would become very excited with these coffees and a chocolate shake. So, when I left Bob's, I would be racing home with plans for certain parts of a shed, right? Then, I would find the right kind of wood and I would start cutting them up with my power saw, nailing it, fitting it and working it. And I would be almost in heaven with happiness"
I'd say it's an excellent way to get a feel for what it takes to build a home. There are a TON of details, especially if you don't want it to rot.
If you intend to heat it in the winter, be sure to consider the effects of condensation. I made the mistake of building my first shed without proper ventilation, and it was like indoor rain when I turned on a space heater. For my second, more permanent shed I've followed building codes for real homes to avoid making any more big mistakes like that.
I'm building a kids playhouse at the moment and I feel the exact same way. I'm in here working at the computer just enough that I can bail to the backyard for the day and cut timber.
"Whenever you can build a shed, you've got it made"
"I'm a shed builder. If I was just left alone, I would build sheds. I would plan them at Bob's Big Boy Coffee Shop, and I would become very excited with these coffees and a chocolate shake. So, when I left Bob's, I would be racing home with plans for certain parts of a shed, right? Then, I would find the right kind of wood and I would start cutting them up with my power saw, nailing it, fitting it and working it. And I would be almost in heaven with happiness"
http://www.thecityofabsurdity.com/quotecollection/sheds.html