Even when there's not an urgent need to stock up on food and household goods, there's no doubt shopping at Costco makes sense for a large family with a large home to house all the bulk items. It can save tons of money every year. But what if you are single, or live in a small apartment, or even call an RV your home? How is Costco worth the membership fee if you don't have ample storage space? We turned to Costco itself and Costco shoppers living in small spaces for some tips to help you decide if a membership makes sense for you.