A similar thread came up a while ago:
I’ve never used GitHub - uktrade/fargatespawner: Spawns JupyterHub single user servers in Docker containers running in AWS Fargate but it might work for you- it’s using ECS instead of EKS. The idea behind fargate is that you only pay for the computing resources used and not for the overhead of running the ECS cluster so it could work out cheaper.
EKS can also run with Fargate nodes, this might allow you to use Z2JH without paying for a full EKS cluster- since the JupyterHub hub and proxy pods don’t need much resources you can leave them running on EKS Fargate. This isn’t something I’ve looked into though so I might be wrong, but if Z2JH works with EKS Fargate that’s a very nice option for running a scalable cluster using the standard Helm chart.
If you research this please report back, it’d be very useful for others!