The odds are really quite low in absolute terms. A lot of people who’ve made the switch to Free 2 Play (F2P) seem to be much happier with the decision.
If you have questions about how to be a F2P rockstar, I’d encourage you to open a thread and ask for advice from @Brobb, @JonahTheBard, @Jedon and @Rook. They’ve all spent next to nothing and do very well.