People from both sides should pay for the wedding
who ever cancels the wedding should have to pay for it .
It often ends up being the bride's father ... but it should be whoever designs (plans) the wedding.
all depending if he is rich
that is not necessary, attendance at a weddingand/or any wedding gifts are always optional regardless of your relationship to the wedding party
Pay for your own wedding, or talk to them You could set up a loan, or pay half yourself
Since you are his guest to go to the wedding then he should pay for your air travel or at least split the cost depending on his finances.
You should expect to pay about $300-$500 for a high quality gold wedding band. You can find cheaper silver ones that are still quite nice though.
It is not a contest as to whom pays for the damage of a wedding ring. If it is the wife's wedding ring then the husband should perhaps surprise her by buying her another and if it is the husband's wedding band then the wife can do the same thing for him.
Ask your mother, or family member, they should be the ones you trust and should know.
The groom's parents are only responsible for paying out of town guests at rehearsal dinner for: Parents of the bride (some parents are divorced and one ex may live out of town or both live out of town, but often the out of town parents of the bride will pay their own way if they can financially afford it); Maid of honor; bridesmaids; flower girl or ring bearer. Any other relatives or friends that are not in the wedding party should pay their own way.
what does the groom parents pay for at a traditional wedding
It's possible, but I think the bride and groom should split the total cost for BOTH wedding rings.