What is the best irrigation solution for 3000ha flat sugarcane plantation ?

My company is undertaking a feasibility study and preparing technical document on selecting a pressurised irrigation system for 3000ha in Botswan. The geographical area is flat  to a little sloppy having silty clay soil type. We will be growing sugarcane.

Which system is more recommended for such a flat area having sufficient pumped water from a river and a place where there is scarcity of labor on a day to day basis? We are evaluating center pivot linear move and side roll system. Which size is more economical for center pivot?  Please share your experience with us. Also share some documents, pricing and catalogs for selecting the appropriate irrigation system for the mentioned area and geography.