so coming off from an ammo guy and constantly buying ammo products, its now the summer and when having a large amount of cars, washing them every day, im going through the small bottles. The product is great but im not going to keep paying the price so im going to try out some new products for the meantime. What is the best shampoo's out there that come in gallon or large sizes? Also im pretty new at detailing and i want to widen my array of products, i have pretty much the basics (Shampoo, wax, sealant, spray wax, wheel shampoo, wheel cleaner, tire shine, citrus bug cleaner, leather cleaner, leather conditioner, carpet cleaner) and then all the tools and accessories to go along. What else should i purchase, i have a polisher but i dont think its dual action so i might need to buy a new one like a rupes or flex.