客户让我当中国地区的采购，怎么谈？？？

外贸从业5年，第一次有客户恰好在我想离职的时候主动找到我说想让我当他们中国这边的采购，负责所有的事情；
办公也可以选择home office ;考虑到接下来要装修新房，想要自己的baby，所以还是有很大诱惑力，除了以下几点还有什么需要在签合同前谈？在这里先谢谢各位米有的指点。
1.Details of my job including work hours (China time ) and holiday ?

2.For salary ,what's the percentage for each order ? And when pay to me by what kind of way ?Bonus every year ?

3.And how about business trip within Guangdong province and other province ? And any insurance ( five insurance and housing fund in China ) ? Have accident insurance for business every year about $130 ?

4.How to communication? Email ? Skype or Video ? By mobile phone? Any allowance if by phone ? Any allowance if work at home due to reduce the office fee and other fees .

5.How many employees do you have now ?

PS：什么网站上可以直接找类似这样的工作？深圳的