I’m all for self hosting but I just recently moved from a self hosted NAS to a dedicated small Synology box and I like it. I still self host several services but now I can do that on a laptop that sips power vs my large tower enclosure. I also bought a dedicated MikroTik router rather than self hosting pfsense or Untangle. Despite now having 3 machines instead of one, in aggregate, it still uses less power than my tower server. The laptop provides its own battery backup and now my router and NAS only use a small amount of energy so I can get a UPS that’ll last much longer. I also like the separation so rebooting one device doesn’t take everything down, etc.
I’m not saying one approach is right or wrong, just throwing out a different point of view.
All the services you point are great. Proxmox is a must imo.