Do you own your own pasture? If the horse will be boarded at a stable you may be able to work off his boarding costs by doing chores there. My thoroughbred is stabled and he is in the pasture 24/7 and hay twice daily is included in his boarding fee. I just supply his grain.(7.00 per bag) I spend 30.00 on farrier costs about every 8 weeks, wormer every 6-8 weeks(6.oo per dose) . He has had to have antibiotics once for three days and that costs 7.00 for a big bottle I can use again. I gave him the shot myself so no vet cost there. If you have your own pasture all you will have to pay for is farrier costs and worming. And an occasional vet visit. It can be done..) I payed nothing for him so that helped..I think 150.00 is a deal..