Have you considered the wire/metal storage shelving units sold at Target and Walmart and Home Depot? Most have adjustable shelves so you can space them any way you want, they're very easy to put together with a screwdriver, they'd be cheaper in time and money than permanent wooden shelves, you could buy them one at a time to spread out the cost, they don't alter the value of your home, their non-acid surface is safer for fabric storage, they're movable, they fit in closets perfectly, and they come in lots of sizes so you can custom fit your space.