A modern room and wallpaper removal

I came across the Kreiss site today and just loved the look of this room: cool, clean, comfortable. It's called the Libra collection and surprisingly has materials that I wouldn't normally consider, like marble (always thought that too high-end shi-shi for my taste) and wrought iron. But I like how bright and light the room is, with several accent colors and the contrast with dark materials. I've always liked the look of a white room with dark floors -- it just looks so spacious and airy (I guess tall ceilings also help in this instance).

And I really like this chair:


for the low price of $2575. It looks so comfy, yet has clean lines and looks solid. Hoping to find a close replication for much less.

Meanwhile, I'm looking into wallpaper removal options for the apartment:

• a step-by-step primer, from This Old House
  
• video and instructions on what to do when someone has painted over the wallpaper, from an episode on Ask This Old House that I saw on PBS
  
• step-by-step, from Zinnser (using their products, of course)
• information on stripping and how to paint afterwards, from This Old House
  
• and lastly, I've heard about spraying the paper with fabric softener mixed with hot water

One of the articles mentioned that you should use an oil-based primer after removing all the paper and glues because the water in water-based paints might reactivate some of the glues. But can you use water-based paint over oil-based primer?