It's so damn expensive these days. Even at a smaller, no-name ski hill it's going to cost at least $600-700/day for lift tickets, gear rental, and lessons for a family of 4. At a place like Snowshoe, you're looking at $1K/day. At a famous resort, easily $2K/day.
And that's after you outfit everyone with ski pants, jacket, gloves, goggles, helmet, base layer, etc.
The person who recommended going for 5 days to a place like Solitude in UT has the right idea. You can't just do it for one day, as you need repetitive practice to develop muscle memory.
There's a new Club Med in Quebec at Charlevoix that just opened this winter. It's all inclusive - meals, drinks, lift tickets, gear rental, and lessons (for kids & adults) are all included in the total price. I think it would be a good solution for any family willing to learn. Plus, skiing is just simply cheaper in Canada. If you're willing to do the drive, it would be a good spring break.
Plus they are having a really good sale right now because Americans don't want to travel:
https://www.clubmed.us/l/quebec-charlevoix