Okay well I can't really do more because I'll reach the build limit trying.
There is no way that's anywhere close to 256000 bricks. I guess, maybe if it's indirect spam, then that would be true.
You could have at least tried to make the roof more curved, using steeper ramps closer down. I always do 5b height, two 3b heights, three 2b heights, four 1b heights, three 3b lengths, and two 4b lengths as the smallest arches I can make. I never learned that actual angles, so this is how I name them.