If you are not familiar with these you are missing the best commercial yard sale of goods around. Check the Yellow Pages. Restaurants go under all the time and their used or outdated properties end up there and can be in absolutely great condition for cheapo resale. And the best is to use 2 to 3 pots at a time, all with different temperatures, so you have the full range of wax working types and consistencies to choose from as the piece progresses. Seldom have less than 50 lb.
Smaller quantities can reach a flash point very fast and the danger lurks high there.
I also hang several bristle paint brushes into the wax pots from side wire frame hangers. If the wax ever gets too hot it will let you know by the bristles dissolving. Then you are really playing it too close.