So curiosity is the primary motivation. You don't have to be first to market. That makes it easier, you can focus on making it better. Or just launch it now, you will get a different experience (e.g. Kickstarter or something). Breaking even and making money takes a long while, so you have to be able to fix the day job first.

Have you tried a lunch and learn to build up a case? Teaching people something new and answering questions is a different type of challenge and allows you to build some support to fix things that seem to be set in stone. Is there any way to do your day to day a different way? What about trying a new tool to record testing results?