Ah makes sense.
I don't like those massive purses where folks carry the whole kitchen sink. My cousin actually has a purse inside a purse-- makes no sense to me. She carries her full set of makeup and almost anything else you can imagine. But I do carry the following: advil (i have a tendency to get stress/allergy related headaches), lotion (I have atopic eczema that tends to always flare up randomly on my legs-- if I didn't have my lotion I would scratch holes in my legs), lip balm, wallet, camera (I am an amateur photographer and even on my frequent business trips I take a nice compact camera in case I see something-- if I am going on a photography trip I have a big DSLR so I tend to leave the purse at home since I have well.. lenses, equipment in my camera bag), headphones (I don't like holding my cell phone up to my ear), feminine stuff, a pen, sunglasses. I can't imagine how I would carry that stuff without some sort of bag. Ironically when I travel for work and have to schlepp a computer up and down a city street, I don't carry a handbag. I just use my computer bag and all of the stuff I normally carry in a purse will fit in it as well.
I have two favorite bags-- one sits close to my body on my shoulder. It is one of the few bags I have ever used that doesn't slip. The leather is what Hermes calls taurillion clemence -- basically chrome tanned calfskin-- and it just drapes around the body. Last trip I took with a friend where we walked around a big house (Biltmore Estate in Asheville, NC) I wore a cross body bag in the same leather so I could also carry a water bottle. It did get a little heavy by the end of the day but I would just prefer to have the stuff I feel I need so that I don't go nuts (water, lotion and advil are musts).
I am not sure if it is the type of riding discipline customers you have-- I had a few friends in the western world and it used to blow my mind that they would have a living quarters horse trailer, with a big fancy truck, big fancy bred horses-- but would try to find the absolute cheapest farrier, trainer (even if the trainer was beyond sucky), cheapest grain possible and cheap cheap tack. I had a friend who was a trainer and it used to blow her mind at how much people wanted to nickel and dime solid training on their super fancy horse.
I used to think, wow your farrier may be super cheap but what does that do long term to your expensive pony? Same with trainers. Myself, never owned a horse trailer, and never replaced much tack, only a few repairs because I always bought very nice, quality tack that could stand the test of time unless a freak accident happened.