Business Directory for Wordpress Site

We need to have a business directory built for our wordpress site. I have attached a simple example of what we are trying to accomplish. We ned the directory to be searchable alphabetically and possibly by category. We also need to be able to include an image with each listing. The listings will be stacked on top of each other and if needed each letter can be on one page if that simplifies the search function then we can just put a to z at the top of the page and each letter will hotlink to the page with the listing for that letter of the alphabet. There are going to be less than 200 people in the directory so we are not trying to make this overly complicated.