One client I had with a packed 3rd house had a mentally ill brother, so sibling was destroyed to some degree. Make sure you look at what house cusps are in the sign as well.
In addition to that general rule, its always a good idea to look up the meaning of multiple conjunctions in Garga Hora, that is also part of the Classical Delineations in Kala.
My father has 4 planets in his 2nd house of Libra. He grew up in a wealthy family back in his home country, and he still takes alot of pride in their wealth. However, he has never quite successfully been able to manage his own financial responsibilities upon moving abroad. There's been alot of debt incurred through bad business deals, and bad financial decision making. As adults, my siblings and I are now financially responsible for all of my parents living expenses.