Plan to visit Kunmimg, Dali, Lijiang and Shangri-la, how many day do i need?

If you want to travel lesuirely, around 9 to 10 days are suggested.

Hi, is it advisable to get a budget local tour or just get taxi to move around for 4 persons ?
Which local tour is reliable one?
Can we pay when arrived China instead to pay all before departure ?

You are advised to book a tour to cover these places. It is more convenient for you. As I know, TravelChinaGuide provides warm service and awesome sightseeing routes. You can contact them through tourstravelchinaguide.com and get more detailed information. Have a try! :)