In 1987, most computer users were still using DOS based programs. It was then that Lee Thomas, with help from Benjamin Powell Jr., created E-Z Estimator. At the time, it worked fine, though it was strictly character based. Its target market was the small heating contractor, but users included electricians and builders. For years, they wanted an update for Windows. Unfortunately, about that time Thomas was starting the process when he was diagnosed with cancer of the larynx. Software development was delayed for two years, and thereafter Thomas' ability to concentrate on writing code was limited.

Today, development is complete. The typical user of E-Z Estimator would begin first using the program after a prospect calls with a request for an estimate on a job. Not unusual, the user would inspect and measure the site and determine what materials, supplies, labor and services would be required for the job.