$70 for a trim for one horse maybe where I am. $250 and up for shoes.
Last time I did seasonal self care, it was in a place with expensive hay but mine didn’t eat much except for in the stall overnight plus a flake of alfalfa for lunch (out on pasture for 12+ hours) and with hay, feed, farrier, and shavings, I was definitely over $600/mo per horse, and that is without any vet care, bodywork, supplements, paying for the dry stall (which was to help BO with utilities, insurance and the maintenance stuff they handled) or accounting for any value of my labor.
And that was before the costs of some things skyrocketed. I wish I could pay only $33 for my horse’s RB! It was $35 back when it was “cheap”!