Depends on how many vacs you run, but seriously, it makes good business sense to cost out each contract that you have, this then enables you to make a profit long term, once you start employing people, you will find that they rarely take good care of equipment, most of our vacs are repaired at least twice per year, this is normally down to cuts or serious abrasion of power cables, this must be costed, or else you can find that your profit margin is affected, regards,
Rob