pumps can be dirt cheap.There are online auctions,P bought a Gast double diaphragm pump,brand new, pulls saf at 115 C and cost $75.At a local auction bought 3 refridgeration oil vacuum pumps for $50,one was not working,one distills saf at 85 C and the other at 95 C.Put ad in the local rag and sold the 95 C pump for $125, so the others were free....took 3 nesting cardboard boxes, with the vac inside and a blanket between each box.With an opening for heat escapage and a sleeping bag draped over the whole thing, from 6 feet away it is inaudible.