The wife must be made to understand that he should help her interfere in her own finances, not her family. This will interfere with your family's plans. With his wife's forgiveness, his family will not be a problem. Explain to your wife that the family needs more money to prepare for future investments. Instead of being a house slave. Obviously, their family interferes with your family too much. Causing the family development plan to stop. As long as you can get your wife's understanding and support, it is impossible for her family to interfere in your finances.

I think the key to this matter is that your wife is vacillating. As long as you can persuade her to support you, your future plans should not be a problem.