Luckily my missus is very understanding of my little projects (though, I think she views them as obsessions)
We're finishing up the work on a suburban renovation project at the moment. With any luck we should have it a palace at about the time our mortgage is paid off. (we're at the £70-80,000 equity mark at present, so it's going well.)
I bought the empty shell for next to nothing and have spent less than the mortgage for a decent house would have cost over the last 6 years in renovating. Had a few cold winters along the way, of course.
We're more or less committed to the idea of buying a plot WELL away from civilization. Well a broadband line would be nice...
If we have our way, we'll be using solar, wind, hydro if there is any, biodiesel and biogas to power the new house. We've already bought the Class A energy efficiency appliances.
Like you said, why pay someone to do something you can do for yourself. Even if it DOES cost more. What else are we going to spend the money on? I don't really need a ferrari! (Although, if someone has one they need to get rid of....)