早上收到一个尼日尼亚客户的邮件，这样说着：
I need to visit your factory and need an invitation for a business visa to visit China (will    provide the necessary documentation).I also need a stay for 2 days and transport service to and fro airport at your companies cost.

Once we are done with these arrangements we will proceed further for the payment of first installment

听说了很多尼日尼亚的骗邀请函，现在有点怕怕。各位，邀请函要怎么弄呢，去哪里办？他说“I also need a stay for 2 days and transport service to and fro airport at your companies cost.” 他的意思是要我预算他大概花费多少钱还是要我全程帮他出呢？