I guess I'm at a loss here. What beside routine cleaning and lubrication (if needed) would you need to have done?
If you have a stationary miter saw (Pistorius, Ledsome, Brevetti, CTD, etc...) you will probably need to get up with their distributor for any extensive servicing. Same goes with V-nailer and Vac press. Having a trained technician fly in and work on your tools is gonna be big $'s though.
If you are really too busy to take care of the day to day maintenance of your machinery, the solution might be to hire a part time employee so some of your time will be freed up, or you could train them to do the job.
I guess it might be helpful to know the size of your operation, and the make and model of the machinery in question. There are folk that buy and refurbish used machinery, and they might be available to service yours on site.