I think ive spent about £300 on detailing stuff since ive started. But i love taking care of my car rather than taking it to a swirly car wash.
I use SRP, EGP, Chemical Guys snynthetic detailer, Poorboys nattys blue Wax, Silverline rotary, Sonus pads, Poorboys polishes, Megs polishes, Megs wheel dressing. And lots of microfibers mainly.