I don't know your age but steps become a liability as we age. I am 70 and 5 years ago we added a main floor bedroom, bathroom and laundry room. The whole upstairs (5 rooms plus a bathroom) is now my sewing, etc space and I'm fortunate to have that. Yes I have steps but is no problem yet and is actually good exercise. When either of us gets to the point where we can't do steps, I think it will be time for us to move off the farm for reasons other than just doing steps. I like the suggestion about using your current space for guests and have your sewing space within the house.