Right now, the two gentlemen can be considered the repairmen of the Wood Dynasty, with far too many places in need of a financial fix. They're no doubt thinking of prying out a bit more from Master Bertram and patching up other areas…
Their "mistreatment" of Master Bertram isn't for their own sake. Moreover, they wouldn't force it, and Master Dunn had a masterful way of "playing the victim".
Another reason was that cash wasn't plentiful. If rushed to liquidate assets, it would result in serious discounts. For instance, young owner Leroy Baker, who was savvy at doing business, particularly invited Master Bertram out for wine, with a good-natured suggestion of having him sell off the confiscated properties to the Moses Sect at bargain prices.
Over the course of two months, Master Bertram only managed to hand over five hundred million Spirit Jade to Master Lane in three separate installments. The next payment was planned for two months later.