Lighting with the best fixtures you can afford, I put in T5 lights and fixtures. It's just like sunshine all the time. If you plan on having friends/family come and sew, do you have portable work tables and chairs for them? I got some heavy duty portable tables from a used office supply store and could afford new chairs from IKEA. Also, check IKEA for some roll around drawers that can fit under a table or sewing area, they are perfect for small notions and thread storage. You might want a TV, radio or fan.