Lactose intolerance: how do you deal with it?

My teenage son is lactose intolerant. He loves milk and I have to buy the lactose free stuff. It's not cheap up here (over $9 for 4 liters). He's normally ok with cheese and pizza etc (doesn't need lactose pills).

I'm just happy i don't have that issue.

It's probably cheaper to buy the lactose pills in the big box from Costco then use regular milk or buy Almond milk.