Thank you very much for a very thorough run down of the system, we are based in the EU and are trying to make sure that we have as few mandatory ties to US manufacturers as possible while running a modern IT system.
We have thought about MikroTik and Extreme but our CTO wants us to investigate Ubiquiti as it has a nice web UI for all devices on the network which would be a big advantage for our small network.
I will push for a small POC network or demo so we can get a better understanding of it.