I think boarding would be a good option for you.
PLEASE shop around for barns first even before you start looking for a horse. Every boarding barn is different, and you really want to talk to the BO or manager first. Don't be shy to ask questions, you're the one who may be paying them to take care of your horse. Have your best friend come with you.
Ask them if they have pasture board, it's usually much cheaper than paying for a stall. Ask them what kind of hay they use, their grain, where do they get their shavings, which farrier/vet comes out there. Would it be possible if you wanted to bring your own hay or grain, or work out a boarding agreement where you're the one you comes out twice a day to feed or whatever. Ask if there's a discount if you clean your own stall. I would shy away from a barn who wouldn't allow you to bring your grain or hay. That just doesn't sit well with me...
This is how much it costs for me:
Horse cost: $1500
Yearly shots: ~$100
Teeth: $85/ once a year
Trims: $25/ every 5 weeks
Dewormer: ~$12/ every few months
MSM supplement: $15/ every 2 months or so
Grain: $42/every month
What my trick was before I actually bought a horse was I bought brushes or anything that you don't need the horse for yet. (Ex: saddles, bridles, blankets, things you need to know the size for you can't buy until you get the horse) So by the time I got the horse I had almost everything I needed.