A nice little game, I like the idea a lot!
It was hard to figure out where what is, because the camera is kinda close and there is no world map, and I also think the “optimal” route is easy to figure out: Buy the health education, since it seems to pay the most and all the options cost 30k (Unless I missed something). Something you could also add would be promotions, you need to work x years here and your salary increases, or being able to invest your money! There is definitely potential here!