sack truck
battery
box with pump in it
25 L barrel ( which does hold near 30 L when full )
thats it really
tank in van with sub pump to fill barrel , i now have 2 sub pumps running together, 26 L per min , so takes 1 min to fill my barrel
a sack truck is built for moving weight around with ease, talk of crop sprayers from china, talk of the freedom trolley ( which is a purpose built trolley based on a sack truck. lets me honest about it )
a few hours to build it, job done