It wasn't technically RB's money, it was Pamela's money.
That's a very valid point. It reminds me that it was the Speakmans, rather than the Boutflours, who held the wealth. They were the business people, the Boutflours, I believe, were academics. It's pushed that RWB was the one who pulled the strings, but it was Pam who held the purse strings. It can, of course, be argued that Pam gave him free rein, but it's only conjecture.