have tried both the element and gas route for heating the water ,
and have to conclude that the gas way is far more effeicint and present cutomers and new all go ooh , ahh watter is hot ,
over time the cost of running the element is far higher and you have to insulate the tank /s , plus the water looses heat over the time you carry it around .
on demand hot water make it quicker to clean fascias , soffits and conservatory rooves
as with everything , its how you present and sell the goods .
the van is clean and the inside is painted to look professional ,
and why go pay £1000's of pound when you can easily do one yourself for a fraction .