Minimum will take 3 days all up, One day/night at the Wat/temple, One day for cremation, Next day scatter the ashes. 1.5k is ridicules. does that include the coffin, fuel for the 'oven', basic food for mourners, coffin bearers, Monks. Although not part of the ceremony, your body and all docs. will be needed to be sent back from the police autopsy in BKK to your desired Temple/Wat. I feel sorry for those you leave behind.