Inexpensive ways to remove wallpaper

When we moved into our home, we noticed that our previous owners had children. Thank goodness there were no handprints or crayon on the wall, but they did leave us with some wallpaper to prove it. How else could someone get away with this:

cute. 

and this:

...the birds and the bees? Maybe that's the perfect wallpaper for a baby's room...
 

As wonderful as the choices were, I didn't want to be thinking about the birds n' the bees all the time, so I knew I needed to remove them.

I have only heard of how painstaking it is to remove wallpaper, so I wanted to try some inexpensive ways that were hopefully just as effective as any product being sold on the market.

My first method was with a plastic scraper and a clothes steamer (can you spot the drippy marks on the wall? And yes, that nasty weird paint mark, too?) 

Although it did remove it somewhat well, it did turn the room into a humid sweatbox and it required quite a bit of steam to get the paper loose. After removing drooping wallpaper, some chunks of pulp were left on the walls and it even took out bits of paint (I'm guessing it could've been the plastic scraper... maybe this could've been avoided with a soft scrub brush). 

The second method I tried was with laundry detergent + water in a spray bottle (equal parts of both). 

I read online somewhere that this was an effective method when coupled with a scratchy dish scrubber. 

All you had to do was spray on location a number of times and scrub away (some spots required quite a few sprays for the wallpaper to soak up enough solution), and the wallpaper would come off quite easily. If there was a resistance, just spray some more and scrub.

The diluted detergent removed the wallpaper quite well and compared to the steamer, having the room stay the same humidity and smell like a fresh load of laundry was a bonus! The only downside was the clumps of soapy wallpaper you had to clean up.

Another option that I read about online was using a wallpaper scourer (similar to a pizza cutter, but with teeth) and some windshield wiper fluid in a spray bottle.  I was intrigued, but wasn't a fan of any chemical-soaked paper being scattered on the floor for our fur child to eat (trust me, she'll eat anything). 
Have you tried this method before?

I'm interested to hear if there are any other inexpensive ways to remove wallpaper without much of a hassle. If so, do share! :)
I'm currently spraying these rooms down and would love to be enlightened with an alternative :)

spraying away,

:)