How cooperative - or not - is the rest of your family in getting rid of the "stuff" that is being stored?
Where have you been sewing now?
Have you considered having a set-up/kit like people take to retreats and bring that to your current sewing area?
And then consolidate all your sewing "stuff" in that room? Maybe use that for your cutting and pressing area?
Where is this room in relation to the rest of your home?
For years and years, my sewing machine was in the corner of our kitchen/eating area, and my ironing board was a more-or-less permanent fixture there. I actually got more done - back then when the kids were little - than I do now where all my stuff (and I do have a loooooot more stuff now than I did then) is downstairs.