It is a big decision to make and a goodly amount of money to invest. You must decide, if your strength problem might also interfere with folding, handling the fabric/dies and whether you have the arm strength to actually piece on the sewing machine too. All those activities involve shoulder/muscle use. I'm not trying to put a downer on your situation, just expanding the scenario. Also, because the GO BIG, (electric one) is big and heavy, I think it's better in a dedicated "spot"--- I may be wrong, as I have just the GO. Will the physical limitations improve over time?