How to install machines?

We will send the engineers to install and test the machines and have training lessons abroad, but the Visa fee, round tickets, accommodation, eating, and the allowance of 100USD per day per person will be on customer's side.Or the customer can send the engineer to our company to complete the inspection of the goods, as well as the installation and training lessons, but the Visa fee, round tickets, accommodation, eating, and the allowance will be paid by customers.