GG, that's a hell of a roof. Architects need to get their head out of their ass. Also, with that kind of slope steel might be dangerous once the snow starts to slide, although it might not ever stick(??)
I put steel on my house when I built it and had a similar situation to what Mad Mike showed, the first year. Had to dig a tunnel to get the bike out in the spring. I put snow stops on the next year; the long ones not the multiple little ones. I have a big hill behind me to the west that blocks the prevailing wind, so almost all precipitation is dropping straight down by the time it gets to the roof. That winter we got snow, rain, freezing rain and more snow all within 24 hours. Ended up with about 10 inches of the equivalent to ice on the roof. When it got sun on it and it started to move, it ripped off a few pieces of the snow stops and crushed others; leveled one of my stack vents breaking the ABS inside the attic to do it. I still need to fix that; I just stood it back up and left it. That being said, I still think steel was the right choice.
Just put a new shingle roof on my son's house last week. 6 guys under 30 and me. Two compressors and two guns. About 1350 sq ft stripped, ice and water shield, underlayment, shingled, cleaned up including cleaning the eavestroughs all for fairly cheap (I'll update this with a price once I hear from my son) and done by 4:30 in the afternoon. Smoothest roof I've ever done. Only had 3 vents, chimney, Hydro stack and one stack to cut in around, which helped. We debated steel, but this was a rush job as a couple of the guys were on vacation last week, and wouldn't be available if we didn't do it right way. Got everything from Roofmart. They boomed it right on to the roof. Lots of new products since I did this regularly in the 70's. Precut caps and ready-made starter strip saved time and waste.