Drafters, as well as architects, can work off pre-created plans or create their projects. As you may want, creating custom plans is more expensive than working off pre-created plans.

Yes, Draftsmen commonly charge between $100 and $150 per hour. The charges will be according to the rooms.

As the name indicates, CAD (Computer-Aided Design) is a designing/drafting software that is generally used in various engineering fields such as civil, mechanical, electrical, etc. Designers use it to make drawings such as floor plans, electrode circuits, piping designs, etc., which benefits the production staff to execute the same. It also helps in creating 3D designs.