I've had a log burner for about 9 years or so and they're really not expensive to run. A large bag of logs, that lasts me about 3 or 4 evenings of burning, costs £3.50. Kindling is about £1.00 for a large bag and lasts months and the free newspapers that come through the letter box cost nothing. I have the chimney swept once a year at a cost of £40.00. That's it really. The only cleaning of it is emptying the ash pan out once a week and that goes straight onto the garden as a mulch. I clean the inside of the glass doors with a bit of vinegar on a piece of newspaper, which goes straight back into the burner to use as kindling on the next burning. I wouldn't swap my log burner for a gas or electric fire but, if mobility is an issue, carrying logs into the house might be a problem for some people.