My father ran into this same problem when he planted the "new" trees at his house. He started using a 250 gal tank, he would fill it with water and then use his Bobcat to carry it to the trees. But he got sick of making so many trips and also he needed the Bobcat at the house in order to do this, which didn't alway work since it would sit at jobsites for 3-6 days at a time. So he then found a 500gal poly tank that he put in the back of one of his F350's. That worked for a while until he disided to down size the number of trucks he had, and didn't want to load/unload the tank all the time. Then dad a old gravity box with 5 ton running gear. We ripped the gravity box off and welded in some supports and mounted the 500gal tank on that, and this is still the set-up that he is useing now. It works out pretty good since he can use either the BX2360, L4200, his truck, or even the 4 wheeler to move it around the property to do the watering.