You think Bmouth will survive forever? Pretty much outside the top six, everyone will get related one day. Bmouth will. We will. West Ham will. Over half the league will. Promotion/relegation is much more a short term thing than building a new stadium.
(It's still not entirely sure what your counter point is here. My original point is that Bmouth spend badly. There is a huge amount to admire about them and their manager, but spending money is not one of them. Mings, Brad Smith, Mousset, Ibe, Rico, Afobe, Gradel, Defoe's wages. That is a huge amount of wasted money. The jury is still out on Lerma, because he's new to the league and I have at times seen a decent player in him.)