[MichaelApproved]

It can't be that easy otherwise everyone would build 10 or 20 of them and retire.

[csomar]

If it takes you one year to get that product to $1K/month, then you'll need 20 years... But you have to consider that in 20 years, some of your apps will die and also managing 20 apps and customers is a headache.

[iconfinder]

Good point. Although I think there a big difference between building 1 and building 20. A service that earns $1000 will probably not run by it self.

[FrojoS]

Sorry, but that is nonsense. Most people don't even try to think about it. Others, like the poster don't dare to make the step yet and ask.

And of course not everyone can retire at the same time as longs as we don't have a more advanced economy ;-)