I am running HA on a Pi 4 with an SSD card. Super simple installation. Would the process be exactly the same for a Pi 5 or is there anything special?
I'm on an RPI4 8Gig running a 1TB SSDS over USB3.0. I have an RPI5 and am waiting. I probably should have purchased an NUC. Anyway, almost the same (depending upon your install type) but not 100% supported yet. Soon, though I believe. Also I have heard that the type of PCI / NVME you use (if you go that route) you have to be careful some of them do not work very well, I think it is a hardware compatibility thing. The only other thing I can tell you is, you need a more robust power supply with the RPI5 than the 4 (taking into account your setup)