I’m running Nextcloud as a VM on Proxmox, Proxmox running on a NUC6i5SYH, with 32GB and 1TB SSD. The Nextcloud VM had 8GB of RAM assigned, which is more than enough, I think I could get away with 4. There’s only two users though, so it doesn’t see a lot of Intensive usage.
It’s been working like a charm for me for years already.
Hetzner is great, have been using their server auction servers for many Proxmox hobby projects. Just hoping we’ll have proper Cloud contenders in Europe one day, to take on AWS / Azure / GCP.