When we first set up home many of us make do without
Now if you are in this situation it is great in one way as it means trade is very good, but it is not so good in another way as paying someone to just wash dishes is not the most effective use of anyone's time, nor is it the most interesting jobs and the person doing it is not likely to stick with it for long.
So if this scenario sounds similar to your business, then why not have a look at installing a commercial dishwasher? (Do not whatever you do install a domestic machine as it will simply not have the capacity nor the speed that you require for use in a commercial situation).
Commercial dishwashers such as Sammic dishwashers are available in a range of sizes from ones capable of handling the demands of a 200 seater restaurant, through to smaller models, which are ideal for use in small cafes and restaurants that are virtually 'Table top' models in size. However even the larger capacity commercial dishwashers tend to be of the same width and the model variations are things such as basic models have a gravity drain, and high end models have a drain pump for faster operation. Other options that affect the price are models with detergent dispensers that vary between manual and automatic dispensing.
These types of commercial dishwashers offer fixed washing cycles of as little as three minutes, and are ideal for use in a busy environment where multiple trays can be used, one for placing dirty crockery and glasses in, one in the machine being washed, and a third one being emptied. When set up like this the dishwashers can get through huge amounts of washing up. Of note is the water used on the washing cycle is so hot that the dishes residual heat leaves them totally dry in seconds.