Within that time period, you will discover the pesky flaws and can start to build the final product. Some of the most bothersome problems are the easiest to fix. Hallways in many houses are almost always too small. Frequently, architects or designers stick with the building-code 3 feet minimum width. In my experience, hallways work best when they are a minimum of 4 feet 6 inches wide.
Stairways are the same.
Doorways into rooms tend to be problem areas. Do not overlook the benefits of pocket doors. Be sure to use a pocket door frame that has metal stud channels. These frames will not warp over time. Your foundation, crawl space or foundation slab are also very important.