It will depend on how many people you're serving with it, but you can get away with using quite low cost VMs to power your pod. I run mine in DigitalOcean and originally ran it on a $15 (£11-ish) p/m server. I've beefed mine up a bit since then because I had a big influx of users, but really that was precautionary.
If you are only going to be hosting a few people, I'd say you could probably get away with paying around $10 p/m on DigitalOcean for the hosting costs. If you need more storage, you can get S3 hosting cheap ($5 p/m) up to 200GB on DigitalOcean Spaces, or use another service like Amazon S3 which will really only charge you fractions of a cent per GB.
My monthly running costs (including all storage, bandwidth, running, and backup costs) come to about $29 (£21) p/m. This breaks down as:
- Server (4GB RAM and 2 CPU cores) – $20 p/m
- Backups (2x weekly) – $4 p/m
- DigitalOcean Spaces up to 200GB S3 storage – $5 p/m
You could run a less powerful server for about $21 (£15) p/m if you don't need to host many people (you can always scale up if you need to):
- Server (2GB and 1 CPU core) – $12 p/m
- Backups (if needed) – $4 p/m
- DigitalOcean Spaces up to 200GB S3 storage – $5 p/m
Obviously, this is just coming from a DigitalOcean perspective. You may find other hosts with more competitive prices (it's worth checking out Vultr, AWS, OVHCloud to see how they compare pricing-wise).
Hope this helps!
