I just don't see any way to manage clients without vehicular transportation.

Also is the transport and setup of the homes baked in?

I do a medical transportation driving job.

In order for a college degree to be the best in the options listed, you would have to be able to attain a low cost degree but once which you graduate, stay in the field you studied and be paid enough to pay back the loans you have with enough left for cost of living (home, food, clothes, transportation, etc.) + money left for saving and investing. 

Of course, if I were needing to haul around lots of equipment on a weekly basis, I might then go for a pickup or van as well.Regardless of the fact that I own a fairly efficient vehicle, biking is still the better option and the main reason why my auto transportation costs are low.

Video games involving building: cities, transportation networks, businesses etc.

I'm a transportation manager for a scientific equipment company.

The larger Cleveland-Akron-Canton Combined Statistical Area (CSA) has a population of 3.5 million and it is the 15th largest CSA in the country.With its prime location, Cleveland served as a transportation hub on the Great Lakes, which helped it develop as a major commercial center.

The car I used to transport all the materials was a 1988 Lincoln Town car.  

With that comes terrible transportation . . .