Single operator domestic 6hr days 500l used.
That's why i put a 650 tank in last week. With 400l I was running low at lunch time and had to call back.
I could still manage with the 400l but it was taking a 15min plus traveling time bite out of my day. So the £200 investment is saving me one hour and a quarter a week (without traveling time).
one and a quarter times thirty pounds per hour equals a monetary benefit of thiry seven pounds per week.My entire investment is therefore recouped in five weeks, with ongoing benefits.