Ger08 My son and family did this in 2016 in september (45c heat). took them 4 weeks but that included 2 nights in Broome and 4 in kunnanurra getting prado fixed. Drop Broome and Kununarra as Broome can be done anytime. Spend 2 in kunnunurra and just 2 at el questro. It will give you a taste in 3 weeks. Pull a sicky for a couple of extra days 
Thanks Diver I think I’ve factored a few sickies in already
