As jgeorge says, I'd say that a Small Business Server license plus some User CALs and Document CALs would be enough.
I'd just like to point out that the SBE is not a limited version of QlikView Server in regards to volume, speed, tuning... as it happened in previous versions. Shared objects are not available in the SBE, neither some license types, but I don't think you need them according to your scenario.
Anyway, I always recommed to check that out directly with your QlikView Sales rep or Partner manager.
Hope that helps.