Alright, but why would Ten Hag agree to take a job to a club he wouldn't be getting the funds to sign some of the fine players into his team but rather the club management be selling off the good players he could use for the season to build a strong competitive team. If Ten Hag has to lead another bad season with Leverkusen after leaving United with a bad record it will be a dent to his profile in getting a bigger job after Leverkusen's, it is something he should know.
Ten Hag is certainly taking a gamble with his career by accepting Leverkusen's offer, having just failed as manager of Manchester United and subsequently moved to Leverkusen, while they are also selling key players. This will certainly be a challenge for Ten Hag, but he seems quite prepared for the risks he will face at Leverkusen. Of course, in his first season at Leverkusen, we can't expect much from a close competition with Muenchen, as he needs to adapt and build a strong team foundation.
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I suppose Ten Hag should have learnt from his experience with Manchester United for him to accept to take a job for a team that management has no intentions of equipping the team for him. Perhaps that could have been what Xabi Alonso foresaw that made him accepted Real Madrid offer. How do a club sell out their key players and ain't replacing them to ensure the team make a good performance in the coming season?