Ketu in 11th house in Astrology is a neutral position as gains will be received only in Ketu Dasha. In the 11th house, Ketu makes a person a loner or doesn't give them a desire to have any friends.
The 11th House shows gains of all kinds, hopes, wishes, power to achieve your desired goal and your source of income. The source of income is not your 10th house but your 11th house. How will you make your money, or how will you get your (Big) money. Your 10th house shows career, rise & fall in career, and what field you’ll go into after looking at all the divisional charts, but 11th house shows the big gains you’ll receive in your life essential house in terms of wealth.
The eleventh house represents our actions' fruits: income and general fulfillment of desires. It also represents the years after the career is over, enjoyment of a pension, having time to spend with friends, following up on aspirations that have been lingering. The 11th house relates to the 3rd part of the legs, the calves, and shins. The 11th house corresponds with Aquarius. The air quality gives this house some volatile characteristics (aspiration, hopes), Saturn represents the return of good investments made in life (such as building up a. pension). It also adds older siblings and older people in general.
Ketu is the south node of the Moon and the rest of the body of Rahu. This is a headless body representing separation, isolation, and the material world's abandonment. This shadow planet represents spirituality, nothingness, and goals that we already achieved in past lives. In this life, we only rely on those things as a last resort.
Ketu in Vedic Astrology is also an unsteady and sometimes treacherous force. Still, its qualities are more of an abstract, inward nature, in contrast to Rahu, who is more concerned with outward, worldly matters. Ketu can bring hindrance and obstacles in the physical realm of life but indicate sparks of intelligence and the mind's brilliance. The above significations are extremely important to know by heart. You should memorize them and use them often to remind yourself of the essential nature of the Grahas.
Note: The degree of auspiciousness and inauspiciousness will depend upon a complete analysis of the horoscope (birth-chart).