Learning intensively, or by yourself, or with a school/college class? I'm always interested in learning Chinese as I'm actually a Chinese Studies graduate with a PGDip in Translation and 8+ years of teaching beginners (to one degree or another) under my belt.
Have e-mailed my colleague and am waiting for the reply. I'm interested in viola hire/2nd hand purchase and re-sale in Taipei myself, so should be interesting!! Chinese made instruments will be well cheap over there though, so you could conceivably buy one for the few months prac, then sell it off when you leave.