hi tim, thanks for replying us. pls email me your quotation for these brands to mynameisfahmi@outlook.com LG artcool system 3 and 4. 9k btu each bedroom (+ 1.8k btu for system 4) Toshiba system 3 and 4 9k btu (+1.8k btu for system 4) Mitsubishi Starmex 3 and 4 9k btu (+ 2.4k for system 4) what does the package cover? 1) how long warranty? (with additional extended warranty?) 2) Free upgrade piping and insulation 3) most importanly any discount for BULK purchase (group buy) for my neighbours. if yes, how much? Thanks in advance tim.