I love my old MSR and Optimus stoves. If you could afford it, get a MSR Dragonfly, they simmer unattended for a long time. Some of the old kerosene stoves work very well, but may not simmer well, especially for small pots. I collect stoves, so I could go on and on. White gas stoves are inexpensive to run, isobutane is convenient but fuel canisters are quite a bit more.