There are a variety of ways to do time lapse...
Equipment talk first:
On one hand you can use a webcam with a software like YAWCAM (free) to capture a still picture at fixed intervals. YAWCAM can even make the captured pictures into a video for you.
On the other hand you hand use a DSLR with USB interface and use a software like ToneUp S3 (
http://www.toneupstudio.com/).
A Nikon CP995 (or equivalent) and a DigiSnap controller that can do the same thing also.
Make sure you have adequate supply of power to your equipment. That may mean using external power supplies to the camera and flash.
If the lighting can be make constant then it might look better. In this case a simple table lamp might do the job, as far as the photography goes. But I am not sure if the beans would need actual sunlight to start to grow. You can also consider using a flash.
Other things to consider:
Bean sprouts might take a few days or even more than a week. If you have the memory then take at shorter intervals (every 5 minutes?). You can always discard frames later to speed up the video.
Background can be a piece of black cardboard.
Make sure the equipment and plant are not moved during the process.
You probably can put together some automatic watering system where water is slowiny fed into the soil.
Hope that helps. Now let's talk about consulting fees...