can I get Z visa in Guizhou or Zhejiang without going out of china?

hello dears
I'm married to chinese citizen (my wife) in Guiyang, Guizhou. I will soon get my Q type and move to china, and now many schools contacted me for a teaching job, my question is that,
1. is it possible to change Q type to Z type if I found a job in Guizhou or Zhejiang?
2. is there any legal way to work or get z type while I'm staying with my wife?
3. I heard some agencies can help in this regard, is there any recommendations? like changing resident permit to working
4. is there any kind of job (part time, or small jobs) that does not need Z type ? or at least can be ok with my Q1 type?

much appreciate your reply