I'll try one more time...….Dai, everything is relative. Brighton my not have much money, but they are not in full cutback mode. Their budget next year will be very much like this year. They have their own ground (freehold) with a new stadium on it. They have a big sponsor and are generally stable.
You mention the contract with Potter......but that would have two sides to it and are you sure the club kept their side of the deal? More so, there would have been implicit support discussed if not contractual......such as....we have a good team but a lot of youngsters that need developing and bringing through. You will have support to deliver your targets regarding survival and future promotion. No-one had heard of this new wonderboy you have. He might have expected that he could keep him and get a chance to develop his team and playing ethos.
Then again, he might have done his due diligence (I know you don't understand this subject!) and realised that the club was on a downward spiral dn the owners did not have any desire to invest to stop it.