I understand where you're coming from, but the examples provided are not that good. First of all, I'd build everything with the possibility in mind that celebrities won't actually use my app. Helps me focus on the benefits for the average user. Secondly, if a pair of good developers can truly get the job done for a lot less, I would seriously consider going that route instead of an expensive solo hero.

Having said that, too limited ambition can get you the same result that too much ambition can.