Someone who knows more than me about clustering, please weigh in?
https://www.sqlservercentral.com/Forums/1867482/2016-Cluster-Questions-For-Always-On-but-also-with-other-services

What he's thinking sounds like a bad idea, and if I saw a client doing that I would be advising against in in the strongest possible manner, but since that's a test lab he's talking about, it'll work, but...