I'm a one-man team, and the app has not even been out a month yet. Currently has 15,000 Monthly active users, and peaked at #72 US, and #36 United Kingdom. Server costs are currently 40$/month, and I will potentially need to bring on a developer for contract work to rapidly clear out bugs, and help with faster query execution. The app is floating around Top 100 US, and has no plans to leave. I am not monetizing yet.