Cost estimate, and how much of my day will it consume?
Costs are around 170-180 SF. Ride times are around 15 minutes. You need to allow more time for getting to the location. That usually requires taking a gondola and then time to train. You can find more information online. But this should get you started.
http://www.paragliding-jungfrau.ch/seiten-eng/tandem-flights-lb.htm