There's a great book about Wycombe's 19/20 season, in which thy won promotion and were bought by the Couhigs. Really smart operators - you can tell they had no delusions of grandeur. Having owned a minor league baseball team, they clearly knew where Wycombe stood in the pecking order. The first things they did included spend money on making the bars and foot outlets better, and then it's been on pre- and post-match entertainment, to give the fans something more for their money, and to try to attract more people to the ground. A very MiLB way of operating.
So it doesn't surprise me that they didn't go on a spending spree to try to stay in the Championship - a financially sustainable League One side would be fine for them, and if they can get the club to the Championship again, then it's all a bonus.