Girls, off-topic question Hello everyone. My husband's relatives want …

Girls, off-topic question Hello everyone. My husband's relatives want to find a bride for my husband's younger brother. They are looking for a bride and so on. They want to start renovations (I agree with renovating the house where my husband and his brother have lived and still live, which is why we live separately with the children) but it's not just them, there's also a sister with four children and their mother living there. But that's not the point. Basically, they want to marry him off and I agree to help with the renovations in the family home, splitting the costs somehow, and my husband also wants to help by taking out a loan, so to speak, for his brother's wedding. The brother himself will also take out a loan, as he said. But what about us? I'm already stretching thin with the kids and my parents are helping... I tell him I agree to help but not with a loan, he shuts me down saying it's his brother. We didn't have a wedding or even a formal registration.