Nice setup! I have a very similar Homelab minus the Generac (I regret not getting one before inflation kicked in, especially since I already have LNG to the home.)

My only recommendation would be switching your virtualization over to Proxmox (LXC / KVM) and setting up an HA cluster with Ceph and MLAG. It's relatively easy and free and will give you a lot more features than plain ESXi and even free vSphere/vCenter.