Implementation scope or costs can vary greatly, depending on what you are trying to achieve as the end result.   Number and sizes of pages, number and types of modules, adding and editing content, security role usage, and more.   

"Implementation" can be a few minutes for an empty standard install, to weeks of works or more which could include the work with users to obtain and document requirements, determining the solution or functional design, skin development, graphics work, editing, training, and so on.    It all really depends on the project.