Hardware for HA Proxmox

Gday guys,

Probably a bit left field but someone on these forums surely has some redundancy!

Just want to check if it’s OK to have other Proxmox nodes with lighter hardware than the ‘main node’ for high availability.

Current setup
13600k
128GB DDR5
132TB RAIDZ2
Memory usage sits around ~60-100gb
HD usage ~50tb
4 VMs: Scale, HASS, Ubuntu, Win11

What is best (most economical) practice to create redundancy.

Cheers