@miguellima Depending on what services and scale your app needs, between $50 to a few thousand dollars a month. Ideally your app should scale revenue with increased usage and your costs should be a fraction of your revenue that will both grow together.
https://usefathom.com/blog/vapor-one-year
https://divinglaravel.com/cost-performance-optimization-in-laravel-vapor
Also to keep costs low, consider adding protection from DDoS:
https://laracasts.com/discuss/channels/vapor/how-do-you-protect-vapor-from-ddos-spin-ups
An un-checked DDoS attack on a serverless structure can cost a ton of money.
If you plan to use a scalable database, those can also cost a bit extra.