I like Auber. they make a PID controller with a timer function built in.
however, bucket tek requires no temperature controller.
monitoring temps to maintain -45C to -50C is advised.
if above controller could chuck more dry ice in the booze auto-magically, it would be a win.
as far as budget controllers from Auber go. This one is less expensive, but not quite so plug and play.
and then there is the cheap version…
https://www.amazon.com/Lerway-Thermostat-All-Purpose-Temperature-Controller/dp/B07CBQQMDW