I've been painting for 15 years, but just started my own business @ a year ago. I still haven't totally figured out how to accurately and properly bid jobs. If I was to bid a job on an 1100 SF home, what is the going rate per SF? I've always bid by the hour but I have someone that wants a bid done based on SF and I have no idea what the going rate is per SF. Any advice would be much appreciated.