I have extensive experience using Adobe Captivate and TechSmith Camtasia Studio. In my experience, it will take you approximately 2 hours of labor to produce 1 minute of eLearning playtime if you use Adobe Captivate. If you use Camtasia, your labor will go down a bit (1.5 hours for every 1 minute of playtime). If Articulate Storyline is your tool of choice, developers who use that tool have told me that Storyline is on a par with Captivate. In that case, you should plan on 2 hours of labor to produce every 1 minute of Storyline eLearning.