It must be accepted as a rule to which there is no exception that the plumber cannot work with the tools after engaging in business, and at the same time look after the other details so as to make a success of the business venture. The contractor cannot be soliciting business, estimating work, interviewing architects and doing the various other things necessary to business and at the same time do his own work. Indeed, the time he puts in with the tools saving a dollar might lose him several hundred dollars worth of work; for in these busy times of keen competition people are not going to follow a business man to his work to award him a contract or get an estimate. Besides, as a business man he must dress the part, for people do not rate high the overalls business man, and, if working with the tools, he cannot present a suitable appearance for business engagements. Of course, there are men who have started a successful business career in that way and there are others who will do so. But these men rose, or will rise, in spite of the drawback of having to do their own work and not because of the fact. If conditions are such that the work must be done by the contractor, why, necessity knows no law; but where he has sufficient working capital to pay for the labor he should do so. He has figured on paying out a. certain sum of money for labor, the same as for materials, and he is only doing what he estimated to when he pays a workman. Besides, in his operating expenses he has figured a salary for himself, and he cannot expect to do two men's work and earn two wages.