Best practices for a brick and mortar store to start accepting Bitcoin

I spoke with a relative who owns a brick and mortar shoe repair store about accepting Bitcoin for payment. He is starting to get more customers outside his geographic area and is open to the idea of accepting Bitcoin as payment to make it easier for customers to pay him without getting hit with high credit card transaction fees. However some of his concerns: Considering how volatile Bitcoin can be, how does he look up the pricing so he and his customers get a fair price? What are the transactions fees like for converting Bitcoins to cash? What are some of the best practices for storing the Bitcoins securely? How fast can he verify payment? Any other hidden gotcha’s he should be aware of before moving forward on this? Thanks