I would suggest a very basis set-up.
- a sturdy table for the center of the room, big enough to hold a cutting mat and your sewing machine, and still be able to walk around the table,
- a comfortable office type chair for sewing,
- an ironing board set up at one end of the table (or you could make an ironing area on your table)
If possible, I would add a vinyl table cloth or piece of batting as a design wall, suspended from the wire shelving (clipped for easy access to the shelves). The design wall should be your view while seated at your sewing machine.
Storage units on wheels, room on the shelves or closet will happen with time. In the meanwhile, you can still take advantage of your new quilting space and create some awesome quilts.