My experience with our lovely pony has been one of great great joy, the feeling when it’s all going well is… indescribable really. There were multiple times at a competition when we were cantering along, as a team, and my heart could have burst with pride at our teamwork. If I could have bottled the feeling and sold it I’d be a millionaire.
For me, those (comparatively short!) moment made it worth the hard work, often drudgery in winter, soaked to the skin, chilblains etc etc. It’s not even the winters and never ending work that was (really) an issue.
It was the absolute depths of despair when things go wrong - which being horses they do regularly. Field injury with 6 months boxrest, meaning the costs went up, needed attending to 3 times a day every day (huge impact on the rest of the family), months and months of inhand walking. My whole life revolved around it. We got 4.5 months in to the program and he redid it. The toll it took on my mental health was awful, and of course that spilled over into other areas of my life. He did come right in the end.
But the thought of all of that falling on a novice (which I’m afraid he is), with no experienced horsey support, either practically or emotionally, when you’re alone on your own yard with a wife who (understandably!) doesn’t want to be involved and holding down a high powered job… Yes yes, he could be lucky and never have a days problem… but he might not, and if he’s unlucky then the reality is going to hit like a ton of bricks.
If this is a lifelong dream, I get it. Once it’s under your skin, that’s it. But there are more responsible ways of making that dream happen, with a view to the end game of having a horse at home once you’re knowledgeable enough.
Take lessons now
Get a share horse so you gain more hands on experience both ridden and care, and live with the reality of the commitment 3 days a week.
Buy a safe, sensible school master and keep it on full livery for a while, moving to DIY in a year. At that point you might find that he’s happy as he is- he gets his own horse to enjoy but company and support when needed. He can then think about moving horses home if he still wants to.