No, off the shelf routers are usually ARM and opnsense is x86 only.
There's support coming for wifi 6 Qualcomm Atheros chips. The images are still in the snapshot/release candidate stage, so not a full release yet, but they are working.
Vlemmy has gone dark, so I made a new account. Would you be able to re-add me as a mod?
I'm a big fan of my OLKB kit. Hotswap, very solid case, and QMK compatible (which is a big deal for 40% boards), but the kit is a little expensive.
I don't have one personally but the YMDK kit on AliExpress seems like a good option and is cheaper. Just know that it will take a month or two to ship from China if you're in the US.
There's a lot of used mini PCs from Dell, HP, Lenovo that go for cheap on ebay. Those are a good alternative.
I've tried proxmox! Don't currently have any hardware to run it but excited to do it. Part of the reason I don't want to put it on the mini PC is that I can't connect 3.5" drives over sata. I want to use the PC I plan on building as a combo server/NAS.
I am planning on a lot of services, but we'll see about the rack of servers.