There's plenty of it. We could make multiple, if we don't get too cold.

[Which is the entire problem. Snow is wet. It's cold. They're in the mountains, which are naturally colder than the cities several thousand feet below. They might be able to build One before they have to go in and take a hot shower.]

I've never built one either, but there's plenty of snow everywhere. I kept having to dust it off of the bag when I was singing yesterday.