IKEA shelving - add pegboard to the sides for extra storage. if what you put in here isn't this pretty, hang curtains to hide them. This will expand to whatever size you need. Or use heavy-duty shelf units made for garage use & disquise as above.
These are great open wood and metal kitchen shelving racks for storage unit system solutions that will inspire you. “Sara Kate and I have been talking about redoing the kitchen at my family's country place the low budget way — by ourselves”.