You know, the cooking's not a bad idea. You can hook up with some of the local temple associations (Tiandijiao does a lot of classes) or the Aiguo group to publicise.
If I were you, I would probably be looking at:
- Material/Curriculum development as a mainstay (once you get it started, cut your teaching hours so you can keep up)
- Online tutoring (ESL or English)
- Spanish - English translation (don't go the other way if it's written -
www.onehourtranslation.com pays low, but it's good for some pocket money)
- Holding one or two group cooking classes a week. You're not going to get people to pay more than $200 or $300nt/hour for a group class, so try to get at least 5 people in a class. Then you make at least $1,000 per hour. If you set it up so you have one vocab prep class and one cooking class a week, that's at least $2,000 a week right there. More if you can run more than one class.
Something which I always thought might be interesting would be like an all-English after school care service. You know, instead of sending kid off to Anqinban or whatever after school they send the kid to you one or two days a week, maybe $1,000/day. You feed, look after and have fun with them in English - so maybe like Mondays and Fridays, so twice a week, $1,000/day, four kids a day. Take them home, feed them, take them to the park or arrange a game or watch a movie or something similar (something that your son would enjoy as well). Just all English. Some parents wouldn't like it because there wouldn't be time to do their homework (apart from English homework), but some parents would like it (I'm thinking parents of kids at international schools or bilingual schools would be interested). And for you it's only two days a week, and as my aunt said - she can either get a job and pay someone to look after her kid, or look after other people's kids and spend more time with her own.
If you can just set up the 4 kid twice-weekly daycare and one cooking class a week, that's $40,000/month there (albeit unstable income). Then add in a bit of translation and editing/curriculum design and you can make around $50,000/month. (Or you could add more kids or more classes.)
It's all unstable income (as in people will be sick or need the day off or whatever, and that comes out of your pocket) so don't quit at least one stable teaching gig until you have enough savings to fall back on just in case you make a particularly low amount whatever month, but it would be more fun.