Worming costs around $10.00. I do worming every month because he is at a large barn and horses come and go a lot. You can do it yourself. My wormer is a paste and its in this large syringe. You just shove it in the horses mouth and push on the plunger.
My shots cost around $175.00.
I hope I helped. I'm also learning all of this stuff too. I bought my first horse not too long ago.
My trainer gave me a list of horse related prices. I will have to dig it out and update you.