Correspondence is often the face you put before your customers or potential customers. A quality printer is a necessity for this purpose. However, they do have a reasonably high overhead. A laser printer using decent quality paper normally costs in the vicinity to 15-20 cents in overhead cost per page for text. Ink jet printers, while having a lower capital cost, are often more expensive to use than a laser printer and the print quality if often much lower.
Laser printers do have other disadvantages.
You cannot use a laser printer to print multi-part business forms. Therefore, you will need to print several copies of forms for shipping labels, packing slips, invoices, etc. This is one of the greatest inventions in the history of computing. A cut in power, caused by a power outage, blown breaker, or someone accidentally pulling out the cord from the wall, will empty your computer's random access memory, including the job you are doing at that particular time. In many cases, this can be catastrophic.