Just keep in mind that "something big" is just relative. What you're making may be "big" to the people you're targeting, which may only make up a tiny fraction

Just keep in mind that "something big" is just relative. What you're making may be "big" to the people you're targeting, which may only make up a tiny fraction of the people out there. So, does that still make it "big"? Also, selling your current codebase seems to be a very real option. I've never done it, but I know there are sites where you can sell your half-started websites, etc. Have you thought about just putting your code up on GitHub so that it may potentially attract an open-source following of people that want to use it? It sounds to me like your mind is already made up. You know what you want to do.