Hi,
Obtaining an instrument is possible I think .
Sensor chips you can buy at Xantec.
Maintenace you can do your self (after some training)
Remains spare parts. Main part that you may have to replace is the IFC. And as far as I know they are only made by Cytiva and not anymore for the older systems you want. So when it is broken you have a big paper weight.. Generally the IFC is replaced once or twice a year and is rather expensive.
My option would be to find a different (SPR) instrument capable of kinetics. When the teaching of kinetics is your goal many more cheaper (and less expensive in maintenance) instruments are available.
Check out
www.sprpages.nl/instruments
www.biapages.nl/
Kind regards
Arnoud