Don't hesitate to use the services of a good IT copywriter. Then let him or her put what you must communicate into the right words. The investment can pay you back quite well even on a tight budget.
Look for someone who is independent to avoid the higher costs of an agency or large design firm, and who works in tandem with a designer. Before your first meeting, make a list of all the tools you think you'll need--even if you can't afford to create them all right now. That way, your copy and design team will conceptualize them as a cohesive family of tools.