How much should I charge for painting walls and ceilings( rolled on paint) for a standard double wide mobile home ? One coat with primer. Home has some furniture but no one living in it.

I am in Toronto, and used a local company that does allow you to calculate both paint and labor cost on their website. They have some basic package so you can get some ideas from their software calculation. The also link in to Sherwin Williams color software which I found helpful as well.

See: http://www.paintwayplus.com/Products.html . It might help you