How much do you pay a month for your horse?

The horse was free, the land was $148,000, the barn was $84,000, the fencing was $2700. The hay is $6 a bale, haven't needed a vet yet since I've only had the horse 2 months. One hoof trim - $40. Saddle free, rest of the tack was around $50. The doctor bill is yet to be determined, but I know it's coming since this horse is barely broke and really spooky. She is an 8 year-old sorrel quarter horse named Sundance. Pray for me...