A/C
My point about the 150/2 was I have been away from the GA scene for a few years. The last thing I remember was the Katana with it's low cost Rotax unit was going to wipe away the 1960's cessna fleet.? With the other side of the fence operating fairly new (leased) piper or cessna 172 (new) fleets, that are more duel purposed and return a better profit / image, busines model.
Besides. Would putting a new engine in a 1960's cessna 150 really solve all the cost problems. I know of two people who bought C150's (one US and one Reims) for circa 15K with mid time engines and c/a's. Yet they both ended up spending £5-7 k in 18 months, without even touching the engine or prop.