Sorry, perhaps i'm misunderstanding what your setup is. You have one small building with 5 employees working in it. Each employee currently has their own jet pack and would like to use a copier/printer/scanner seamlessly without having to disconnect from their jetpack.
If this is the case, i don't understand why each user has their own jetpack when 5 users can use a single jet pack. I'm almost certain a single jetpack can support 5 users plus a wireless print server.
Edit, according to this thread, a single 4G Jetpack will support up to 10 devices. https://community.verizonwireless.com/thread/803560