Basement/Master Bedroom redesign

We have a small master bedroom, with a tiny bathroom, and two small closets. We also have a small bedroom next to it that is very tiny. We are wanting to make the bathroom a closet, and the bedroom a bathroom. Then we are wanting to redesign our basement. It has a long area with a couple of rooms and a bathroom on the side. We are wanting to gut it and make it have 2-3 bedrooms maybe an office and more useable space.