So you need to know what equipment you have, presumably classified by type (eg generator, accessories, other equipment). You also need to know ehere that equipme t is (which will probably be an intersection table to model one or more pieces of equipment will be at variuos locations.
You will need to know what equipment is loaned out to whom. That infers you need a table for customerss, a tablr for loan contracts and another one of those intersection tables that indicates what equipment is loaned out to which customers under which loan contract....
So do your basic analysis of tge project, scope out what you need to include in your model, what you dont need and decide on what you may need to support the organisation going forward.
Take those requirements through the desin normalisation process.
Refine the design in the light of test data, re iterate as required till you have a robust data model that supports the current requirements and probable futute requirements
Understand what normalusation is, what it enforces and why it can refine designs to make them less vulnerable to changes in business requirements over time
I'd rather be riding on the Tiger 800 or the Norton