Question 1. What is the usual duration before the project starts to operate?

This is usually one of the first question the developer will ask. It will depend on the scale of the project, the destination and target, the expected quality, the materials used (need for imports or not), and the budget.

There is always a strong link between the 3 components of a project: duration - quality - cost.

Depending on the owners' requirement, we would prefer to focus on the quality and the cost first.