Not Wierd at all, My DMIL did exactly that when she moved into her condo. Set up the masterbed room as her sewing room and took the walk in closet for her fabric. She lived alone at the time and only had the grandkids or us to visit occassionally, she had a hideaway bed and a daybed in the sewing room. Worked for her and I bet it will work for you.
Enjoy your house.