The equipment costs are just about the same no matter how much your running. I personally don't use a vac for purging as I only run a quad at a time. If your going to do a zip or two I'd prolly recommend a vac, I get around a gram from a quarter, and can fully purge it on a double boiler in about three hours, with your higher quantity it would take forever on a double boiler. You'll need your extraction tube, unbleached coffee filters, rubber bands or zip ties and a deep walled Pyrex dish for blasting and collecting. You'll need something to scrape your dish and collect your oil once your done, I use utility razor blades and a four inch paint scraper. Make sure you clean your blades before you use them as they will have lubricant on them. You'll want either parchment paper or an oil slick pad. I highly recommend the oil slick pad, but don't make the mistake of thinking a silpat is the same thing. You'll want a torch and some kind of dabbing tool just to make your life easier while collecting your product. You'll need a vac chamber as well as a pump for purging. These are going to be your main tools. Don't attempt without an ir thermometer though, especially in the beginning.
