which at a min means heating up to 150C and pulling down below 50um imo.
which you don’t have the capability to do right now.
a vac oven is not the right tool for the job, but could probably be used to achieve those parameters.
a vacuum CHAMBER (BVV style) is cheaper than a oven by a long shot, and using a double boiler you could manage a stable 100C without any need for fancy temp control.
sucking on that with a $99 harbor freight pump for an hr or twelve might get you somewhere.