@yes_and_no
It is possible to make a roof-base family that has rotation, yes. I would first make another family, work-plane based, then nest that into a roof-based template, host the first family to a reference line with rotation, associate parameters, then load into the project, place and roof and then rotate.
Alfredo Medina _________________________________________________________________ ______
Licensed Architect (Florida) | Freelance Instructor | Profile on Linkedin