I will add my two cents
Horse can cost anywhere from 200 to 200,000+. Be prepared to spend a few grand for a sound and safe horse.
where I board my horse it is $500 a month it is full board with an indoor. That is about the norm. Some barns charge 1000 a month for board and some charge 200 a month. The stalls are cleaned once a day. ideally the stalls should be cleaned 3 times a day if the horse is in all day or twice a day if the horse goes out during the day. The best footing for stalls is a dirt base not concrete because that is bad on their joints. There should be rubber mats over the floor. Then you need about 3-6 inches of bedding.
For farriers it really depend on what your horse needs. It your horse us bare foot then it useally coast $30 for a trim job, if your needs shoes it can cost anywhere from $80 - $250, depending on the horses needs.

For vetting. Horses should have spring and fall shots which is usally about $60. If their teeth need to be done that can cost up to $200. If anything happens to our horse that you need to call a vet expect to hand over a couple hundred bucks. Vets usally charge $60 for a farm call.

Other expenses you need to keep in mind is food, hay, bedding, lessons, blankets, buckets, muck buckets, pitch forks, etc...

Having horse at home is a huge commitment. You have to be there everyday to feed them in the am and the pm. It is a lot of work taking care of horses and a lot of money. It is very difficult to make money off of a barn with boarders.
Horse are a huge responsibility, ideally they should be worked 6 days a week. It doesn't have to be riding, but lunging, joinup, in hand , long lineing etc.. It is even more important that the horse gets worked almost everyday if it doesn't have regular turnout.

Another thing you need to think about is blanketing. If you clip your horse in the winter it needs to have blankets on. If you don't clip your horse, in the wnter you have to make sure your horse is completly dry from sweat before putting them away,or putting a blanket on them. If your horse is clipped an the temperature goes below freezing they should have at leat a 300 gram fill blanket which cost $200-300

Horse are a huge responsibility and I would not recomend having horse at home if you are afraid of them or have limited experience with them. I wouldn't even consider buying a horse until you are completly comforable around them. When working with horse you have to be assertive and you be to know what to do if the horse spooks or is acting spooky.

What I would recomend is looking in to some local barn and taking lesson and see if they have any horse available for lease.
Having horses is a finacial, and timely commitment. They don't go anway when its cold out or you don't feel like taking care of the, or are busy.

**forgot to add if your horse needs to be on any supplements these can become quite costly.