It's not that hard. Give CDW a call. You'll need to setup a volume licensing agreement, which means buying at least 5 licenses, but there's some $10 licenses you won't use if you need filler. Also, this is an upgrade license, you need an underlying windows license on each PC to upgrade it.
That is a different product. LSTC != IoT LSTC, it is so confusing. To get the IoT you have to sign lots of contracts, Microsoft sends you stickers to put on each stuff, stuff like that.
Too much $ for me, I'm just using home/pro.
https://www.cdw.com/product/windows-enterprise-ltsc-upgrade-...