I’m just running them independently. Although the proxmox helper scripts automate the creation of a load of bits that I use. https://community-scripts.github.io/ProxmoxVE/
I don’t run much, just a Debian-vm, Unifi docker, Jellyfin and Jellyseer (and some *arr) apps.
I grabbed a cheap Dell Wyze from eBay, then stuck proxmox on it, then Home Assistant in a VM. Works beautifully, plus I can run other VMs and containers. Plus snapshots etc. It runs at 5w idle and 15w under load.
Hate to say it, but unless you go for air-con, just a standard pedestal fan works way better than the evaporative coolers.
This needs a picture of Bruce Willis taped to the front…
I have a rainwater tank, and I use an esp32 (nodemcu) flashed with Tasmota, and a waterproof ultrasonic sensor to measure water level.