Regardless of the model you choose to order songs, I have found a very useful tool to help the process. It’s an app called BandHelper. Among many useful functions, you can enter lyrics and charts for your repertoire, build set lists, scroll lyrics during performance on a phone or tablet, all easily edited before a gig or on the fly.. The repertoire, set lists, etc. are stored in the cloud and available to all band members. There are also band management, booking, and calendar functions available. I’m a solo artist, so I subscribe to the basic package which is $2/month. I love it. Highly recommended.