4 years ago, we paid $16k for 2 outdoor units (18k BTU and 24k BTU). 1 wall mounted unit and 2 ceiling casettes inside a 3000 square foot house. We also paid another $11k for all new electric service run from the pole to the house (we had 100 amp service and upgraded to 200 amp), replaced 2 old school fuse boxes with breaker boxes, and ran new power out to the outdoor units. Your quote is insanely high.