Responses
It's typical for histotical manhua to do it! A noble family could be powerful due to their long history, but be poor in managing assets, territory ecc... I think that is why there are "3 big families" against six, probably there are 3 histarical families that are losing money and power to a new and more capable (economicaly) nobility! That's why the father wants the support of the royal family and the other 2 big ones
Is it me or this is all over the place somehow, like so many details don't make much sense (their relationship in the past, their famille background which is a big family but poor at the same time ot just their general behaviour
..) it may not be much but it feels like it s not consistant