All transfers these days are split over years. We are probably due another chunk soon for Bassey, Paterson, and Aribo.
That forms the basis for a 15M+ spend. That amount over 3/4 years is tops 5M per year.
Not forgetting that we have already wiped out close to 100k per week in wages then come the window opening Beale knows he money to spend. He has already shown that he has an eye for a player so I see no reason to doubt that he will spend it wisely.