Freiburg is an important centre for academia and has a number of top notch research institutes to its name, as well as an ancient and internationally respected university which excels both in the sciences and humanities.
A doctoral degree will certainly only help you to become rich in an idealistic sense. The first contract for a PhD position should have a term of at least one year - after which, graduates are rewarded with their first salary increase.
Architects not only design individual houses, their ideas can shape entire city districts. The salary they receive for designing, planning and constructing depends heavily on industry and their place of work.