Hi envirum, depending on size and materials to be dredged between $12000 and $18000 useing all new materials and a lot less if you use refurbed second hand kit. Most of materials would come from freetown, engines pump, compressor, hoses and metal. Welding gas is not easy to get. Workmanship needs to be constantly monitored. It helps if you know people in large companies who will help you and vice versa.
Personaly I would go along the Airlift path as it lets you work deeper and is an easier system to bring materials from river bed IMO.
Magburaka has several good blacksmiths as they call them who are very inovitive and is also central in the topography of SL and is where I would base my service engineers who could travel in any direction to the customer or my own sites far quicker than from freetown. In SL, you get what you pay for, and some times a lot less if you are not carefull.
Dredgemaster
