What do you pay for your mini horse every month?

I want to get a mini now, because they will cost a little less money feed wise. But anyways, what do you pay a month for food, dewormer, etc. Also, what do you pay for farrier, vet, etc. and how much does it cost you? How often? REMEMBER these questions are for a mini horse only!!! And by the way I will not be boarding it!!!