hi david heres what i did
i bought a 350L TANK from gardiners and premium metal hosereel(about £40)and 100m of microbore.i also bought a fitting for connecting extension hose from trolley to hosereel.i also got some 5 ton rachet straps and me and my dad strapped the tank down tight through the eyelets in my van floor.
i simply leave the trolley in my van all the time and drop the pipes into tank of pure.at the end of the day i reel an extension lead out to the van to charge the battery and fill up tank(DI only).it takes around an hour to fill the tank.i also kept two 25L barrels to take me up to 400L if need be although i find 350L does me most days.
i NEVER take the trolley out.i use van mount all the time.its easier.less faffing pushing trolley,changing barrels which wastes time and is hard work!!
i simply turn pump on,grab pole and reel out to my first job and start cleaning.the hose does do my head in sometimes but it gets easier once your used to it.
i would NEVER GO BACK TO THE TROLLEY EVER AGAIN!!ive been working like this for over a year now.my first year was trolley only and looking back i was stupid and stubborn to not take other guys advice on here and ditch the trolley or use it as a van mount.
on very compact work sometimes i only need to move the van twice in a day as 100m goes a long way!!
hope that helps mate!
best wishes
dazmond