3000 users? You can save the data on disk and not worry about it. Get a vultr 5 dollar micro instance. I don't know why all these engineer driven businesses focus on the wrong things. You don't need fly.io. Of course they will tell you you need them, I don't blame them. But fly.io or kubernetes should always be done by a migration team which you can hire once you have insane profits. Yes profits, the other tiny detai…
Even if it would be best for the company, "managing VMs" is less impressive on a resume than "set up auto-scaling and server IAM utilizing fly.io and Tailscale".
(Even if we all acknowledge that it is one motivation for many tech fads).
Honestly, if this is on a resume the next question should be — tell me why you needed such a system…