Hi,

 Have you tried AbstractorPro™? It's an easy web-based software tailormade for Abstractors. It's highly inexpensive and offers a 30 day free trial plus live demos. It's price already covers as many user creations as you like, plus it has everything automated including fees computation, client/vendor invoice system, and many more features! You may check it out at:

 https://www.abstractorpro.com/