Interested in boat ride from Guilin to Yangshuo, we are two people, how much is it in one day?

Both Zhujiang Wharf and Mopanshan Wharf have cruises. In Zhujiang Wharf, you can find English-speaking tour guides. Thus you are suggested to leave from this wharf. For Luxury Air-conditioned Cruise, the ticket fare is around CNY 300 per person. For Super Deluxe Cruise, it costs CNY 400-500 per person. You can purchase the ticket when you arriving at the spot.
Or for your convenience, you can join in a tour. TravelChinaGuide provides warm service and awesome itinerary. If interested, their contact information is traveltravelchinaguide.com.