Like you, we did a slow, remodeling move when dd was 2. I htink it probably really helped that we owned and worked on the house for a year before we moved in. There are some books that acknowledge it can be sad to leave the old house, etc., and I would have used them if dd seemed like the issue was a big one for her, but it was not. We constantly talked aobut how positive the move was going to be--we would have a large yard to run and play in, she and her bro would have a nice playroom, we would have a front and side porch to watch the rain, we would be in a neighborhood with children, the laundry would be inside instead of outside. And, we never made it seem sad to leave the old house. I am sure I could have made her sad about it all if I would have focused on the sad/leaving aspect. We talked aobut how nice it would be for the new family who moved in and that we would come back by which we did when we were trying to sell it. Especially with the reassurance and continuity of co-sleeping, I think a transition to the new house can be very positive without the insecurity that can come with change.