You can get those little tea light candles for very little.
I've read that 15 can warm a large room. I haven't done that yet, but I have tried what this guy did:
It's a slow cooker, and I'd suggest wrapping the cooker with tin foil so the heat is channeled up to the pan. It takes about 20-25 minutes to cook an omlette. I didn't make tea or anything so breakfast will need 6 to 9 candles if you want a hot beverage and some toast with your eggs.
On their own a tea candle can last 3 to 6 hours, depending on what the manufacturer says.
Also you can go to craft stores and get slabs of wax and make you own candles or even emergency candle stoves:
Just save tuna fish or cat food tins, take off the labels, rinse them out and use them.
Those craft stores have everything, molds, wicks etc.
Just be careful making the candles as the wax does splash and it gets everywhere, so put down some newspapers and be aware that open flames and hot wax don't mix, you could get burned pretty bad if you do this sort of thing over an open flame.