Great questions, flags, and issue spotting
@Herat
One obvious midway gap (cash) filler could be the very tragic (asset depletion) and financial bump from a life insurance policy claim payout upon KD’s tragic demise from non suspicious natural causes old age trip and fall internal bleeding medmel but FD’s not pointing fingers at anyone and for sure KD wanted for the nanny to know that it wasn’t the nanny’s fault.
So maybe FD travels a lot to Italy and/or Greece to source custom marble, tile, murals, frescos, furnishing for his high end homes and high end buyers or to attend to his mother’s non existent business affairs, accounts, holdings, life insurance and business insurance policies, money stashing/offshoring, shell gaming, buyer trolling I mean sales and marketing development (Nigerian lawyers, anyone?), sunbathing, chemical acquisition, playboying.