I have a slow cooker, and only ever use it for stews. I've found one pan recipes, unless there's a real need for slow cook times, are just less faff when done in a pan since you have to sear meat, caramelise veg etc. If saving money and time is a motivator, I advise people to check out pressure cookers, they reduce cooking times and total gas/electric use considerably. They make tough meats tender, and it makes cooking bulk purchased dried beans and lentils far cheaper than the tinned stuff too, without the long cooking times that put many people off.