Hi, Can i have a quote for mitsubishi inverter 4 looking at either (4 x 9K)or (3x9k & 1x18K) or (3x9k & 1x22K) all 4 units are for the MBR, 2 common units & 1 study. do i need 2 compressors or 1 is suffice? Please also include/state the warranty, copper & insulation provided, possible additional cost(if any), no of installation. Thanks!