Bump, currently my situation
yeah its tricky, and different tribes have different cultures. In a way it's a good thing marriage is taken this seriously and your relatives all participate. The differences in cultures is why its so hard to marry into some. Like Ethiopians are our neighbours but we barely marry each other.
My brother married into a tribe that when we go visit them to help him ask for her hand, We had to go cook over at their place
and my tribe is proud Folks was like damn their must be a famine over there for us to have to come bring food and cook

. But its all gestures and respect and tying in entire families. Obama is the same tribe, we are Luo. variations of us is spread under different names adjacent to lake victoria in Uganda, Kenya and tanzania. Some Sudanese words we can catch cause we are the same vein and originally from Egypt/ Sudan (bahr el ghazal- which translates to valley of the gazelles)
I've seen it play several ways and a lot of times the woman has a say into how she wants it to go. Like my sister the dude never paid a thing. My cousin when he married, the father was like this is a good family, i'm giving you my daughter take care of her. You don't need to pay me anything. Thirsty families asking for too much is a red flag. A friend of my sister despite having a baby with this lady went and they asked for a ridiculous amount and dude said you know what...
The woman can have a talk with her family and express her wishes on how she wants it to go, amounts etc. She can talk her folks down. Often times also the groom will send uncles or people of similar age to the men on the other side and they'll bond and discuss it too diplomatically. The cultures that give a lot of livestock also themselves have a lot of livestock. Funny enough they don't slaughter many of their cows so their herd just keeps growing exponentially. They'll have 50 cows to give, they probably also recieved cows for some of the women that have been taken by men from other families.
A lot of it is just to have the entire families involved in bringing the woman into her new family, seeing the entire environment she'll be in. What kinda people are these? Will she be in a stable financially home. It's gestures, culture and tradition that shows respect and goes a long way.
When the family is too greedy. Those are red flags. Cause you are interviewing them also. It'll tell you what they think of you.
And we don't pay money in divorce settlements. We already paid upfront
IN your case you said her family is wealthy. So I think its to see how well you can be able to maintain her life the way they did. But talk to the lady to figure out how to soften the blow. Contact respected men in your family to talk to the men in the inlaws situation.