I bought an old coffee maker at the thrift store for about $4 and use it to melt bits of old candles with. I made molds from plastic containers of different shapes and sand molds from the dollar store. I drilled a small hole in the bottom of the container to put the wick through and use duct tape to seal the hole, tie the wick to a pencil laid across the container to hold the wick in place and pour the wax in to set.
It might be possible to use a "hot pot" for this purpose also. If you're not familiar with a "hot pot," it's an electric pot that you put water in and it heats it up. These are especially good for college students to use to make that late night cup of instant coffee or tea or for making hot chocolate.
