I use this approach on bare metal and backup the cluster using Velero to S3 compatible backend. Took me roughly 2 months to feel confident in entire setup. And

I use this approach on bare metal and backup the cluster using Velero to S3 compatible backend. Took me roughly 2 months to feel confident in entire setup. And because I used bare metal the journey was much harder than it would be if I used any cloud provider. There definitely is some learning curve, but if all you want to do is host postgres with some read replicas, then it should be straightforward.