When would be the best time to do a nose job and start fraxel and pulsed dye laser after ulthera procedure?

I would recommend you wait about 4-6 weeks between Ulthera and other treatments like nasal surgery and skin lasers. Ulthera is deep ultrasound that remodels tissues just below the skin surface - there is no overlap in skin changes with Fraxel and Lasers and Ultherapy. Ulthera creates inflammation and tightening in the deep tissues, and swelling can occur within those same tissue layers with nasal surgery, so one treatment may impact the other. 

Although the technology allows for HIFU of Ultherapy to overlap fraxel, it would be best to wait 4 weeks before rhinoplasty. You want residual facial edema to dissipate before surgery. 

Ultherapy targets deep tissues in the face and neck. In our San Diego practice we often combine fillers and skin resurfacing for amazing results.