I Need Your Input

We are having another baby in six months or so, and the nesting instinct is flowing strong. Any of you who have been in my house know that it is teeny for a soon-to-be family of six. With our present arrangement, it is a two bedroom, one bath house, with no basement, and a small attic for storage. We do have a laundry room, but it isn't really heated, as well as my husband's office space(used to be a garage), and a small room where we keep our freezer, and cram full of boxes and things. There are two rooms that run front to back the length of the house, but they are rooms that our landlady uses for her salon, however, infrequently. A front room for her hair cutting stool, and a small back room for her two hair-drying chairs. So we can't put too much stuff out there. Right now our boots and some coats and my small cabinet sewing machine are out there, as well as a bushel of potatoes from the garden. Anyway, here are the pictures. I hope you can see the layout of the house, with all the closets etc. The rest are angles from the different rooms. I haven't gotten to my bedroom or the kitchen.