Tips/Advice for a future TinyCat library?

I am the library director for a very large online university. In decades past, we were only in a few states and spent many resources on maintaining a print collection across many campuses. We moved from a card catalog to Horizon in the 90s. We still use Horizon but are down to less than 100,000 item records for physical items. We've been aggressively weeding and purchasing electronic copies over the past 5 years. We're working towards a 100% online library for our students, but will likely make it to 99%. I anticipate keeping