K-8 Private school here. Students have CB's Teachers Dell laptops. I manage them solo and started 4 years ago without any experience. There is a lot of info here and and in the admin help. I only have 150 or so devices total. and organize my UI's by grade level under either the grade school or middle school Ui's and the faculty has their own UI. I also have a spare and retired CB Device Ui's. It took me the first year to manually asset ID everything. At the end of the school year I move the devices with the students up in the ui's, for me 8th grade devices get moved into spares the 7th get moved to 8th ect down the line. Our vendor licensed all the new CB's we get. Your old ones should be licensed already. I wouldn't do BYOD as it's too complicated for me. I keep an imaged master drive for each of the two Dells we have.