Would it be possible to add extra days to the itinerary?

My hu**and and I will be in Xi’an in early May and are looking for the opportunity to visit Yucha Grand Canyon, Hukou Waterfall, Jingbian Wave Valley, Guoliang Village, and, if possible, a nearby gorge as well, preferably with a scenic glass walkway (Tianzhugou, Hongshi Gorge). We have 5–6 days available. Could you please make us an offer for transfers and accommodations for an itinerary of this kind?