Yeah the TG is quite a lot bigger than Fleetwoos, which is significantly larger than SG.
Also the club stated they exchanged contracts on 100 acres and to get that you basically have the large majority land between Blackpool and Poulton. It's huge.
The actual TG area is 'only' about 50 acres...
As for the wealth you only have to look at the dividend he got from the subsidiary that year and think about how long he's been at it, the parent company will likely make far more.
It's easy to see how he'll have acquired quite the wealth surely...