forget hot water systems,they are a luxury,i wouldnt be without mine but your employing so this is what i would recommend if i were you.....
a 2 man grippatank 850L cold water delivery system with split charge relay
2 x fixed claber reels(cheap but a good budget reel for employees)with 100m of microbore on each
2 x 25ft SLX poles(robust and light enough for employees)
a static system RO/IBC tank at home constantly making pure water (or if your tap tds is low) a simple DI system.......