I totally get it, you feel weird using a room that is a bedroom for something other than a bedroom. I've often thought if the option were available to me, that room in my house would also be the best place for my sewing room because it really is a big room. If you are comfortable sleeping in another room in the house, I doze off regularly in the family room myself, then move your stuff into the master bedroom. Once you do it, you'll probably wonder why you waited so long to do it.