Thank you Megan for all of this information. I am very green in this area, so your help has been very valuable.
If we go multi-site, will the search function search across all sites? For instance, if we want to find anything to do with Sister Mary Ellen Smith, and we split up our archives with periodicals and art, would the search engine find any publish articles containing her name and any art she was credited with? Or, would separate searches in each site be required?
Also, and this might help to be the final decision maker: if we start out with Classic and later find a need to use the S version, can Classic be upgraded to S?