If anyone is familiar with Ubiquiti, they have a 50% promo code on their Protect NVR right now for people who own the EOL Unifi video equipment. At $150 (after coupon) it is a very nice 1U rackmount case with 4x3.5" HDD bays.
I've seen in the past that is it relatively simple to install Debian on these. The CPU is a Cortex-A57 with 4GB DDR4. As similar as this is to the Pi 4, could it run the Pi boot image? @tmm1
If anyone wanted a single drive option in a nice clean form factor, they also make the Cloudkey G2 Plus with a 1TB HDD pre-installed for $200. It runs Debian with a APQ8053 8 Core and 3 GB RAM.
Protect NVR:
Cloudkey G2 Plus

