Yes, it is quite dangerous cooking it actually. You could do it outside, if you can, but yes, it will evaporate on its own. It may take a few day to a week, but it will on its own. Just make sure you put it in a spot where there is not too much heat, open flames, and in a place where you don't mind the slight smell of Alcohol and Weed.

I could see the made oil being made with food, that can easily be done. The hard part is making the oil

The chemical that use must be evaporated though. You don't want to injesting the chems. and such, thus, the stomach ache. When the chem. is fully evaped though, you should not be able to taste it at all. It should taste very pleasant.