Yep, you're certifiably insane. I say this with love and from experience!!! We built a beautiful brand new house and moved in in January 2007. We then sold it and moved with a 1.5 and 2.5 yr old into a 20 year old sad and tired house in 2009. If it stood still we reno'ed it both inside and out - all while living (and DH working) in the house. We had some interesting times, some noisy times and some just plain awful times but all in all, it could have been so much worse.

One word of warning - if you are doing anything with internal (or external for that matter) walls, cover EVERYTHING. Brick dust is the finest dust I have ever seen and it gets into and onto everything.

Good luck. I love renos, and building, and decorating, and designing, and . . .