It’s hard to become an indie developer. Most of us start out by working weekends and nights on our dream project, hoping that it gains enough traction to quit our consulting gigs or full time jobs.
What really happens for a majority of solo developers is they end up putting a month or two into their project, and it gets placed on the back burner because they either get excited about a new idea or they get wrapped up in a deadline for their full time gig.
Assume this is going to happen to you. Create something that can be done quickly, something you can just blast through and get out to the market. Besides, simple ideas can actually do really well: both Pocket God and Flight Control were initially done in 1 week.