Experienced roofer, but new to subcontracting

We are preparing to go from being part of a crew to having our own crew. We’ll have full insurance and have our own dump trailer. With over 15 years of experience we have the skill, but are going back and forth with the business/pricing side. In the midwest, what is fair pricing per sq. and pitch charges? We’ll prove to be a reliable and quality crew!

Also, when speaking with a potential new sub, is there anything that really catches your attention and creates a strong positive (or negative) impression?

Thanks for your help!