Dunno anything about Luizhou. I personally thought the cost of living in Guilin was much better than nearby Yangshuo, but it's difficult to find a properly paying job there due to the large number of Western tourists willing to work for peanuts there. I'd take a decent offer in Guilin if I found it, but thus far have been unable to. Yangshuo, on the other hand, is absurdly overpriced and the Buckland brothers virtually monopolize the ESL industry there. In Yangshuo the supply of native English speakers far outweighs the demand (the town itself has been referred to as the world's largest English corner), so your chances of getting a good deal there are slim to none.