I have a favorite method of removing wallpaper: vinegar and hot water.

We tried the gel stuff from Home Depot, which is $13 for a jug, is hard to work with and pretty gross, stains the carpet and causes skin irritation. Maybe because it's lye.

The second time we did it, we tried renting a commercial steamer, which was $35 for a day,very heavy, causes steam burns, and can't get into tight spaces because the paddle is really big.

This time, I decided to try hot water and vinegar, because a big jug of white vinegar is about $4, why not? So far, it's worked better than either of the other two methods. The trick is getting the top layer off, and soaking the bottom layer before you try to scrape it off. It's also cost much, much less. We already had the wallpaper scrapers and the scoring thing and one spray bottle. So far, it's cost about $6 for a big jug of vinegar and another spray bottle.