In todays internet age simply having a website that displays well desktops does not cut it. Every year more users are using their mobile and tablet devices to access websites. Making sure your website displays properly in those devices gives you beter chances to get that extra sale or lead.
If you already have a website built, how do people come and find it? It isn't like the classic movie Field of Dreams, if you build it, they will come. Are you utilizing Social Media properly, or using Google Local ads to attract your desired customers.
A great thing about computers is that they help automate tasks. Sometimes your standard out of the box Excel, Powerpoint or Quickbooks will not solve your business process flow as a custom solution may. When you multiply the time savings and reduction in human error it becomes a very reasonable solution.