Welcome Valen2!
Ditto what DeeAnna said^^^.
I'd never seen a halogen oven before so out of curiosity I looked it up and just watched some YouTube videos how to use one..... and I just wanted to say that I personally would not use one to make soap, at least HP anyway.
The reason why is because the heat is generated by a halogen light on top that is circulated by a fan blowing downwards, which would be like HPing with the lid off and blowing hot air down on the cooking batter, which would dry things out and make it hard to pour.
Having said that, though, you might be able to use it for CPOP if you were able to warm up the oven a little bit, turn it off and then stick your soap mold inside, but the shape of the oven will limit what kind of mold you can use.
But good news- like DeeAnna said, one doesn't need an oven or crockpot to make good soap. With CPOP, all that one is trying to do is to encourage the soap to go through the gel stage. You can do that by wrapping your mold in towels and setting it in an enclosed box, or as DeeAnna mentioned, an insulated cooler. Since the saponification process generates its own heat, an enclosed box or insulated cooler will trap that heat and help to encourage the soap to gel.
Also- if the outside temperatures are warm enough, you can just stick your mold outside. That's what I do in the summertime here. Our summers are really hot where I live (110F/43C), and all I need to do is place my un-insulated mold out in my garage for a few hours to achieve full gel.
IrishLass