I just wanted to mention that de-worming is done 4-6 times a year not twice but the cost is low $10 at $40-$60 a year and I have yet to meet a horse who doesnt need to be trimmed before the 8 week mark and most require a 4 week trim, 6 weeks at the latest.
Also you didnt calculate shoes or leg management such as boots, wraps etc (all depending on its work load of course) and first aid.
I can't stress first aid enough. From thrush and abcesses to cuts and scrapes, rain rot, pests and parasites like lice and ticks, you need aneseptics, gauze, vet wrap, antibiotic ointment, a thermometer, and that's just the bare basics.
I do agree that you sound very level headed and mature We need more kids like you. Good luck!
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