I can give a quote on the sort of roof materials this competes with.
I had to have the tile roof on my 1923 house replaced due to a massive hail storm (in roughly 2006). The house's footprint is about 1000 square feet, so not entirely sure of the actual roof area (probably about 1200 sq/ft), but the bill for removal of the old roof, some repairs to the sheathing, and replacement with new tiles was about $55,000 - materials (Ludowici tiles) and labor.
The solar roof quote for our roof from the Telsa website was about $48,000. So, in my case it would have been competitive.
I had to have the tile roof on my 1923 house replaced due to a massive hail storm (in roughly 2006). The house's footprint is about 1000 square feet, so not entirely sure of the actual roof area (probably about 1200 sq/ft), but the bill for removal of the old roof, some repairs to the sheathing, and replacement with new tiles was about $55,000 - materials (Ludowici tiles) and labor.
The solar roof quote for our roof from the Telsa website was about $48,000. So, in my case it would have been competitive.
My new tile roof has a 75 year warranty, btw.