Only if you are hired as employees...is so, then workman's comp is not all that you need...there's taxes and unemployment...it'd be better for him to use you as private contractors he doesn't have to obtain insurances and such. Just make sure to keep track of taxes and such for yourself because you will have to file taxes with a 1099
It may be penny wise and pound foolish to forgo Comp. Is the work hazardous - even involving lifting, driving, or could you lose your sight? Since Comp includes lifetime medical for work-related injuries, this benefit can be very valuable, especially if you can't continue to pay health insurance because of an injury.