remember though an additional cost of a shingled roof is that it has to be over 5/8 or 3/4" plywood (you can use OSB but not as durable in several ways, I wouldn't myself). Whereas tin just requires a couple 2x4s.
Just another thing to figure into the calculations. Even aside from 'what you can scrounge', I don't think there is a general answer because it will depend on your climate what's cheapest/best
JMO,
Pat
Just another thing to figure into the calculations. Even aside from 'what you can scrounge', I don't think there is a general answer because it will depend on your climate what's cheapest/best
JMO,
Pat