As far as soaping tools go, an induction cooker is not that expensive
@Vicki C, a good investment. You could use an induction cooktop in your soap room. It saves on electricity/gas and is safer than a burner. I bought
this one from Amazon because I can set the temp to hold steady. I took a magnet into the store to test the bottom of soup pots and found an affordable stainless one to use. I have a ring that sits inside the pot of water to keep the #5 PP bottle elevated off the floor of the pot, creating a double boiler. Last year I rendered suet on the induction cooktop. For those who hate the smell of rendering fats in the house, the cooktop is portable and could be used outside.
Should I add that sometimes I even use the induction cooktop for making dinner?