Cost of Installation

The cost to install a metal shingle roof is approximately 4.5$/sq foot and lasts 50+years

The cost to install a tar shingle roof is approximately 2.5$/sq foot and last 10-25 years.
Savings: on average a roof will need to be replaced three times in 50 years so the saving would be
4$/sqft.
Other Savings:
You will save on air conditioning. Since the shingles are self ventilating they act as an insulation.
You will save on snow removal. Since the shingles don`t hold the snow, snow buildup is minimal.
You can possibly save money on Insurance.