Okay, so here's how the data breaks down:

The idea is the project will be a rideshare program. The idea being that each one of these objects shown will be shown to the user as a unique ID (so that they can do specific actvities.) Each portion of the data structure is built by the user and it needs to persist between runs so that it can continue to be modified. For the scope of this project, I don't need to worry about more than 1 user accessing the program at a time.

One posibility is to just add the unique IDs that I'm giving to the user to the actual objects and ignore inheritance all together; however, doing that would make the implimentation of this system much more difficult. It is true that certian "modes" of this program will not require the whole structure to be rebuilt; however, these repesent the minority of all cases.
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Kwyjibo. A big, dumb, balding North American ape. With no chin.