There is a real danger of us losing out on CL football for next season of course. Arsenal made £24.5m from the CL when we were knocked out by Barcelona two seasons ago. Doubt it was less last season and it will certainly be more this year and next season.
Getting a player who helps us get to the CL for next year basically pays for his transfer fee, even if it is someone like Cavani. A few years ago it only took an Arshavin, but due to inflation it may take a Cavani these days. 🙂