I only have a camping gas stove in my van, using butane canisters and I manage fine, being careful to save spare hot water in flasks. Actually I have 2 gas stoves, the other is my reserve stove, a Coleman mountain stove which uses mixed butane and propane so it works better in colder weather.
For heating I use a bio ethanol stove, a small cast iron chimenea about 18 inch high, works a treat, gives out heat and then remains hot for another hour after fuel is burned out, like a radiator. Haven't had any problems with smoke deposits, and if the fuel is pure you shouldn't get any but it depends what you are using as a wick.
Got ventilation and carbon monoxide alarm but it has never gone off in 2 years.
I also have a Ghillie Kettle which I use outside to heat water for washing as much as possible, it's free heat and quicker than using gas for same volume of water.
I have 85 battery with plug in led lights, mini 12volt fridge in summer which works only when engine is running, through split charge relay, I use the battery for charging mobile and laptop and for stereo, and have plenty of spare power most days. I also have a plug in portable 13 watt solar trickle charger from Maplins to keep either battery topped up and it will also charge laptop (not much charge this time of year but it is putting some charge in but works well in spring, summer and autumn).
A basic, simple, cheap system which works for me but might not suit others. Am not quite full-timing but nearly, I go home about one or two nights a week for bath and washing machine. So far the winter hasn't been cold and I may find it difficult if it turns cold for a few weeks.
