We go through a bottle a year for just the cooktop of the stove. If I try to run the heater as well, I will go through a bottle in 3 weeks (that was with me at home all the time)

Just looked at a house with gas cooking, gas hot water (continuous flow) and a gas heater. They claimed they used a bottle a month.

We pay $99 per bottle and I think about $35 per year per bottle for rental.