The invoice from the estate agent will be without VAT and can be paid by Van Delden Holding.
You can book the invoice in VDH and Premier Dutch as loan or RC from VDH to Premier Dutch and
You book the THB 850,000 you send to VDH from the account of PD as loan from PD to VDH.
You can do the same with the THB 100,000 cash you took from the account of PD.