I've just put together one over The Christmas holidays, using the instructions here:
https://diyodemag.com/projects/all_s...i#downloadable
as a base. I've noticed a few errors/changes that needed to be made with the current RPi operating system. If you're a little savvy then this could work for you.
Otherwise, I've had success in the past running the Thomas Jacquin Allsky software on a Raspberry Pi Zero2. only just though. you'll need to disable some of the extras, but it is doable.
Otherwise, a RPi4 and 4Gb of ram is more than capable. Get a POE hat with a fan, and a POE injector to make powering it easier. The RPi HQ Camera works well enough, and
this lens provides full 180 sky view with the HQ camera.
A cheap Security dome from Ebay or Amazon, and a little bit of ingenuity can get you a nice little Allsky Camera setup.
I've built mine in a piece of 100mm water pipe.