Hans,

No experience with either of those, but if you're looking for one-on-one tutoring instead of group classes you might want to give Gail an email (gail@popupchinese.com). She works with a lot of teachers and might be able to set you up with someone personally.

The going rates for tutors at BLCU is around 50 RMB per hour these days. And there are schools like 地球村 in Beijing, my (pretty old) review is here, not sure what prices are like these days, but it is likely still fairly inexpensive:

http://www.chinese-forums.com/index.php?/topic/2200-global-village-language-institute-diqiucun-%E5%9C%B0%E7%90%83%E6%9D%91/