Do u really only get a half hour to walk threw the whole thing? Seems really expensive for just 30 mins

You get as much time as you want in the ice castles. And it may be expensive but it's definitely worth it

When you register online you are reserving an arrival window, you can stay as long as you would like.

You can spend anywhere between 30 mins to a couple of hours. We went through everything in about an hour including wait time for the biggest slide. It is very cold in there, so we decided to leave in in hour.

When you sign up online. You sign up in a 30 min window, so people are spread out through the day, but you stay as long as you want like others have said.