As usual, I'm very impressed by the amazing scores reached here. Congratulations to all of you, and especially Winnow!
Although it didn't produce an extraordinary score, here are the few things that I did:
I gave my Sims the following traits: Handy (obvious), ambitious (to get more LTHpoints/wish => faster LTR), over-emotional (to keep them in the green bubble as much as possible), loner (no time lost to socialize), then athletic or disciplined for their LTW, Physical Perfection. I should have given them The Tinkerer for the sake of the challenge, but this wasn't matching the story I had in my head...

The 1st day in SV, they learned handiness at the Library, then I sent them to their first trip in China. They 'stole' the books from the base camp ($ = good beds at home = faster sleep + better moodlet). They survived on morsel for the whole challenge. I picked up 4 incense holders too and a tent. I paid attention that they completely upgraded the Hot Springs on the 3rd day of this trip, there is a routing issue there and I didn't want to suffer it on the 2nd trip to China.
Back in SV, they upgraded (yeah :-) and slept at home, each one in a good bed in his own room. The first LTR I picked up was Prepared Traveller. So, on their 2nd trip to China, they had 15 days to spend. When they finished their last upgrades on the 2nd day, they spent their time at the Academy to fulfill their LTW and catch a maximum of LTH points, and all the needs LTR.