Whats with you and china?
Travel to Bhutan is relatively expensive as it comes up to 100-200
plus USD per night, so a 5-6 days tour would set you back by
somewhere to 2k, and that's excluding air fares. The only airline
that flies into Bhutan is from Bangkok or some cities of India, and
you must travel as a group. Dunno where to find the tour group that
goes into Bhutan.
I'd love to visit Bhutan in my lifetime coz it's still one of the
most remote countries in Asia.