It was such a relief to program in user mode for a change. Not having to care about the small stuff is wonderful. - Linus Torvalds

(In answer to the question: In the extreme case, if it was just you doing all the code, and the rest of the world quietly used it, would it make sense to give it away free? Unless you're particularly grateful for other free things you've got off the Net, would the answer be No?":)

Anybody who tells me I can't use a program because it's not open source, go suck on rms. I'm not interested. 99% of that I run tends to be open source, but that's my choice, dammit.

Nobody should start to undertake a large project. You start with a small trivial project, and you should never expect it to get large. If you do, you'll just overdesign and generally think it is more important than it likely is at that stage. Or worse, you might be scared away by the sheer size of the work you envision. So start small, and think about the details. Don't think about some big picture and fancy design. If it doesn't solve some fairly immediate need, it's almost certainly over-designed. And don't expect people to jump in and help you. That's not how these things work. You need to get something half-way useful first, and then others will say "hey, that almost works for me", and they'll get involved in the project.