Installing a booking engine on a hotel site takes very little time. Developing a booking engine by yourself requires superhuman computer skills and incredible time!
This is why hoteliers call on specialists who have been developing and refining their solution for years. What takes time when installing a booking engine is the customization and integration with the hotel's technology suite and site design.
If you customize the solution yourself it may take you a few days at most, if you entrust it to the developer of your site or to the provider of the chosen technology, it will take a few hours!