Chris - how much in total is it costing you to get all the equipment needed.
whatever the l5 unit costs and delivered about £100, for a 6gk lite bottle from calor gas incl gas and bottle rental about £60, obviously you gonna need fittings, hoses etc, and best to get it checked by a corgi gas engineer. so if you know one a few cans
pretty much it.. so anything from £120 - £200.
dont forget to check with your insurance company thou - they prob wont charge that much if anything so long as its checked by a corgi gas man!