The price ranges you received seem to be Klang Valley pricing. You need to specify the type of wires. For example, the Cat 6 network cable, specify Schneider or BELDEN.

Most important things: you have to watch up those subcon.

For my case, the main contractor subcontracted to a local Chinese Chargeman, who has the license to sign Borang G. Then, this folk sub to foreigners. The subcon let the foreigners to do everything. You have to specify to your main con that the local subcon (which will sign your Borang G) to supervise the foreigners.

You can see what happened to my house:

https://forum.lowyat.net/topic/5292604/+20

I got a new electrician in for 2 weeks. More nightmares, all our house wire are connections. Worse, the foreigner loop 20 over light points for one circuit and without the yellow lines. You need to ask them how they loop.