Roofing Equipment. Help roofers?

Well, if anyone here does roofing in Canada/USA
just wanted to know if I want to start a roofing company, what sort of equipment I need.
I have been working as a roofer since 2years and now I want to start my own roofing company.
I KNOW THE BASIC ONES i NEED.
Air Compressor
coil nailer
you know [...]