I've done it all three ways. I've found it best for the employer to have me on salary so that I'm not hampered by number of hours worked. Gives me the flex-ability to do some prospective jobsite visits and perform ground work better.
Commission is okay, but, I've personally only accepted it when the quotes are in excess of $100,000.00 jobs and my take is 1.5% of the total quote. Course, I get paid only if the employer gets the job, so that keeps me from just running a bunch of numbers to get paid alot of money for nothing.
