(serious answer) It all comes down to how you manage money in the relationship. Yours, his, ours? Do you meet the family budget goals and is another pair of skis a reasonable request, or does it take away from (paying down debt, savings, other financial goals) My hubby and I do money stuff together, as uncomfortable as that may be. But we've managed to acquire toys for both our passions over the years. (skiing, whitewater, mountain biking)
I know, I'm such a party pooper. But the way to handle these things is pragmatically- you have to show proof that there's no reason to complain about the expenditure. Does this mean working overtime, selling excess crap on ebay to pay for it, not paying off the mastercard for another few months or what?
If he's resistant, I'd be willing to show how to make it happen without affecting the agreed upon budget. Examples, the skis cost XX, I'll give up my morning latte, take the bus instead of driving, take a sack lunch instead of going out every day, this will free up YY amount of $$ and that will pay for the skis in ZZ months.
I know, who asked for practical. Convince him with sex instead.
gg