I would think that if there is gas to a cook top already, that wont be a issue. Any RV center should be able to give you a idea of what it will take. Then again you could get a stove top oven for a lot less.
We have done things to make our 3 season unit more comfortable in the cold including window covers, ( heavy bath towels will do), stuff the vents, padded rugs on the floors and I'm working on getting insulation into hidden areas like behind the cabinets. We are more comfortable and the furnace runs less. A true 4 season will have it's tanks ans water lines enclosed and the furnace will deliver heat to those areas. I'd have to run dry if it were freezing day and night.
