how much would it cost and what would i need to bag my 98 4 door jimmy. i would just want it to move around , side to side front and bak. i dont have alot of space in my trunk cuz i have a system so dont tell me no big ass tanks. i only have maybe 12"s of space from the door to the box. if i were to get them i would want to dump quik and raise up quiker.