Rahu in 10th house

10th house is material management, it's the ability to manage one's material life and to have some power to provide on a material level. To be in charge of one's material life. 

Its simply  the ability to capably manage the material side of life, to be in charge and so secure in ones material life. 

Material life is having your basic needs met for food and shelter. 

Material life is having your basic needs met for food and shelter. 

Yes, rahu in cap is also trying to manage its material life but from a place of making it work in a place not neccessaily of its own choosing.