
you don't need tanks installed, you can run your appliances straight from a gas bottle.
A regulator with twin outlet for two bottles, (one in use and one back up) can be bought for £80.00 by shopping round.
A 47 kg bottle currently costs about £32.00, we've been running a range for just over a year on a 19kg bottle, the bottle is about a quarter full now, and thats cooking for a B&B everyday as well as our own meals. Oddly, a 19 kg bottle is only a few pounds cheaper then a 47kg bottle, but the 19 came with the range cooker.