You can get an Professional OEM license from Kinguin[1] for ~$30. One limitation I am aware of is that you can only license / activate one system at a time and

You can get an Professional OEM license from Kinguin[1] for ~$30. One limitation I am aware of is that you can only license / activate one system at a time and I had to call MS to get the key unlocked after upgrading my gaming system. [1] https://www.kinguin.net/category/19429/windows-10-professional-oem-key/ https://www.kinguin.net/category/19429/windows-10-profession...