in aus i work for a small company and still have dedicated service personnel which is fine.we do about 90 units on a round and generally do bimonthly service. having worked for major companies it is getting to the point(150+) were you turn up check the lift is running,do minor adjustments then walk out. you just dont get enough time if you want to get to all in the month considering calls,9 day fortnight(ie 2 days off per month), sick days and helping other blokes etc.