I’ve had my horse at home for 12 years. Let me comment on some of the problems people are commenting on:
Socialization: This has not been a problem for me, but it was for my horse. I eventually had to get him a buddy. I don’t mind being alone. In fact, I rather like it. I like privacy (and I don’t like “advice”) when I work.
Travel: This has not been a deal-breaker for me. I am away from home maybe three weeks a year; and, it is stressful. Frankly, I’d rather not go. But nothing has ever gone wrong due to my being away.
Barn chores: This has not been a huge problem for me either. Happily my husband is willing to do the barest minimum of field maintenance – and I do mean that he does the barest minimum. And he hauls and totes hay for me. The horses are on pasture (so we don’t need a lot of hay) with a lovely run-in barn. They have an automatic grain feeder, and automatic waterer, and a slow-feed hay net. They don’t poop in the barn.
Facilities: I would gladly and gleefully kill for an indoor arena. That, right now, tops my list of drawbacks.
Motivation to ride: This comes and goes. There’s no question that there are “seasons” in which I make make do with a visit rather than a ride. This is largely because I don’t have an indoor arena. (See above.) But I do ride and I have done so for 12 years. I don’t see myself stopping anytime soon.
Has anybody mentioned emergencies? It is something to think about. I have a neighbor (whose husband travels) whose land is not visible from the road or the other neighbors. She is afraid that if she is injured by a horse, she could lay unconscious in her field for days. It is something to think about. The one time I had a serious horse accident I was home alone. Happily I was able to get to a phone.
Something to think about.
All in all, I love having my horse at home. I do wish I could board him maybe two months of the year (when the weather is the worst). I would enjoy access to real horse facilities, and it would give my grass a rest.