Maybe a software sales model would be a better fit here.
You give away the instructions on what hardware they need , and how to connect it ,and then you sell an integrated software that handles this.
This is also makes far easier for the library to try this because you can offer trial period/monthly software subscription , and they could reuse some hardware they have their(pc,display) , to make the initial investment relatively small, so you need a lot less bureaucratic approvals.
This is also makes far easier for the library to try this because you can offer trial period/monthly software subscription , and they could reuse some hardware they have their(pc,display) , to make the initial investment relatively small, so you need a lot less bureaucratic approvals.