Rahu in 3rd house in Astrology does very well, since Rahu loves the whole glamour scene, and being in the media house it becomes worldly. Rahu in 2nd House In Vedic Astrology is also a good house to have a Rahu for the technical field, good education, and wealth through business. This person is very clever and deceptive in business.
The 3rd House in Astrology represents Short distance travel, like state to state, or from one town to another like a truck driver. The third house also represents siblings and relationship with them, media, networking skills, writing and speaking ability. This house also promotes courage. It's the house of will power and your efforts. Where your efforts will be and how much effort will you put in your work. This is also the house of longevity since it's 8th from the 8th house.
The third house represents the interaction with siblings and is a very important part of the early life experience (before school years). It is a great journey of exploration and discovery, learning how to communicate, and building up, strength and independence. Physically, the next parts of the body are the shoulders and arms. The significance of arms and hands also bring in manual dexterity.
The correspondence with Mithuna (Gemini) adds communication.
Rahu is the north node of the Moon and is a head without a body that keeps devouring things without ever being satisfied. It has a desire for material things and worldly accomplishments. It wants to achieve the highest success possible in whatever house and sign he represents. Rahu represents the goals that have been set by the universe for us to achieve whether we like it or not. Rahu is mainly known as the eclipse, and it eclipses the Moon and the Sun whenever it's in conjunction with them. This means temporary darkness upon the native's life when the Sun and Rahu are in conjunction in a birth horoscope.
Rahu also brings fear and stressful situations into our lives. This is due to Rahu's adventurous nature that loves surprises. With Rahu, sudden events take place; events that may not be a real part of our lives but rather an illusion that becomes reality.
Rahu in Astrology is a very unsteady and erratic force ruled by obsessive passions and unconcerned with ethical notions of right and wrong. Because of this, Rahu can bring great material progress, though any success gained under its influence is likely to be short-lived. Rahu is tricky and sneaky and creates illusions of all kinds.- It especially manifests in one's compulsions of uncontrollable passions.
Note : The degree of auspiciousnes and inauspiciousness will depend upon the complete analysis of the horoscope (Birth-Chart).