The old adage "the right tools for the job" is indeed true. I bought a second hand wallpaper steamer and gave it a shot on the kitchen of Wayne Manor:
There's not much to see in this bad camera phone photo, but that's the point:
The green counters and floors remain, but the wallpaper is gone. G O N E, gone! It took me a year to get the energy/time to do this much, so probably another year before I tackle the cabinets.