Agreed, for air-con, no point getting cheap and have issues later.
Just a check with the guys here for more information as well. I am getting Daikin System 4, 4MKS71.
It is 3x 10k btu and 1x 18k btu. Got my quote from Everjoint Electrical trading at $3699. Going to check out other stores.
Any feedback of the aircon please let me know. A million thanks!!