The mechanical system is one cost, and the cab interior is another, and the two are specified and priced somewhat independently. An elevator fitted with a standard footprint and basic interior finishes is going to land at a very different number than one with custom wood paneling, glass walls, designer hardware, and built-in lighting.
For buyers in South Florida and other luxury-focused markets, cab customization is often treated as its own design project, and it can add significantly to the overall home elevator cost even when the underlying mechanical system is identical between two projects. Most installers build out the cab spec alongside the mechanical spec, and buyers can calibrate the finish level to their budget once they understand the floor on equipment costs.
It’s worth knowing that different system types offer different ranges of interior customization, so product selection and cab design tend to be decisions that happen together rather than in sequence.