I think I've seen your posts on this topic here before. I actually lived in a shared housing situation in a large victorian mansion in Epping, NH in my 20s. I really enjoyed it. I wanted to do the same thing when I moved to Tahoe as the owner, but couldn't afford a house big enough to make it work out.

If I was in my 20s and working in an area as engineer with a reasonable cost of living, I would seriously consider this exact thing. When you are just out of school it is actually nice to be able to share a living space and it makes economic sense.