After I saw this thread I go look at few of his wiring inspection videos. It's good that he pointed out on those makan duit wireman not following specs. House without proper earthing, cable not following proper specs, points for aircond and heavy duty appliances, no RCCB for water heater etc etc.
While it is good if ppl can do the job at a cheaper cost, don't skimp on matters like this. No matter how much money you have, if kena electricuted you cannot bring back life.