For less than $200, you can buy everything you need in bulk!
You gotta have the APC on deck! Scoop up Meguiars APC 1 gallon for less than $30!
A gallon of Meguiar's D1111 Shampoo Plus cost $25. This works well in a foam cannon or 2 bucket wash.
You can't detail cars without a good trim dressing these days. Look for Nano Skin All Purpose Dressing for $25-$30
A gallon of Adam's Polishes Graphene Detail Spray - it's about $50 and highly effective for leaving a nice shine and protection!
3D Iron Remover GLW Series - buy it in bulk and use it in a spray bottle to clean wheels and to decontaminate cars.
Start making money in your detailing business by purchasing these chemicals in bulk. They will last a long time and provide you with great results!