so what do you have for input material? are you making or buying crude? are you going to be winterizing? recovering solvent?
putting an oil mist into your living space sucks. putting a solvent filled mist into it can be devastating. the correct vacuum pump for distillation (two stage rotary vane) is different from the correct pump for solvent (ethanol) recovery (diaphragm pump).
see perhaps : proper venting of vacuum pumps & Rotary vs centrifugal vs diaphragm pump
dunno. hooking it up to a gauge and a pump is where I’d start.