The door-to-door son-in-law is also called the stepson-in-law, which probably means that the man marries the woman's house. Most boys choose to adopt a son-in-law at the woman's house because of poor conditions, and the woman's house has superior conditions. Only by combining the two parties, you can live in the woman's house without paying a bride price, which can save a lot of things, and it is also a way to relieve the pressure for the man, and at the same time you can get some compensation from the old father-in-law
But marriage is marriage. If being a door-to-door son-in-law is a deal, I don't agree with it, and it's not a matter of clearly marking the price.
Excessive and excessive are subjective.
If it is too much for a woman to ask for a car and a house, I don't think there is a fixed standard, and there is no law saying that she can't reach out and ask for money from the other party, but this is unreasonable. If the other party can accept the negotiation between the two sides, then your conditions are not too much. If the other party can't accept it, it is obviously an excessive request in their eyes.
In other words, the so-called excesses and excesses are only a person's subjective judgment. You have your reasons, and he has his reasons. From his point of view, as a boy, when he gets married, he has nothing, and he can't provide his wife with a house, a car and superior material conditions. Then it's a big concession for the other party to marry you. Why are you doing this or that?
Marriage is not a transaction, and love is not a sale.
After all, this is a question of telling the truth and telling the truth. As I said just now, from the woman's point of view, they also have some truth, so this matter is subjective. If you want to find a theory to support it from your point of view, I think it is nothing more than that you put down your dignity as a boy and go to their home. Can you have some dignity and be an upright person?
To sum up, it's actually too much for the son-in-law to ask the other party to buy this and that.