[noonat]

This is a great way to explain it. My wife used to suggest that I work on a side project of mine when I had a few free minutes here or there. I had a hard time explaining why it wasn't really worth the effort unless I could work on it for at least an hour. She trusts me on that, even if I didn't do a great job explaining why, but it seems like this explanation would make the reasons easier to convey.