You could try something like relay.tools to start. 12k sats/month, but easy to deploy.
nostr:npub10npj3gydmv40m70ehemmal6vsdyfl7tewgvz043g54p0x23y0s8qzztl5h is it possible to backup notes from a deployed relay?
Discussion
If I can somehow make it feasible for me to pay an extra 12k sats per month I would. Atm, I just can’t. Things are tight
You just got Start9 running right? You can just use the Nostr Relay app available. Use it as a private relay and all your notes will be backed up to the Start9 from public relays.
https://docs.start9.com/0.3.5.x/service-guides/nostr/index#nostr-service