There are a wide variety of pool construction types and methods in The Gambia ranging from an entry level in ground plastic panelled pool system with a bag liner right through to the reinforced concrete pool chamber finished in a mosaic or large format tile. The following is a realistic budget for a fully reinforced concrete block outdoor pool structure finished in a mosaic tile. Importantly the following includes excavation and soil removal (based on a level site with reasonable access), which is something many pool companies will either ask you to arrange or will be listed as options.