I am not using one at this time. The highest cost item is the VAC Pump. Here in the USA the pump runs about $100. The rest is easy to find at your local building supply store, to make your own. There are many plans on the internet. The homemade ones I have seen work very good, but as like anything else they have their limitations. Also you can adapt them to fit your needs. I have the pump and have it on my list of things I need to make.