How can a young man balance the increasing financial demands of his family, which may hinder his marriage and stability, with his feeling of the necessity to please them while being unable to discuss rationalizing expenditures with them?

Scholars have made it obligatory for a child to financially support their needy parents and to obey them in what is right and proper. If the child is providing for their essential needs, then he is not obligated to fulfill their non-essential, luxury demands if doing so would cause him harm. Scholars have indeed stated that a parent has a right to some of their child's wealth, provided that this does not unduly burden or harm the child. Therefore, set a fixed allowance for them that suffices their needs, and gently and respectfully explain your circumstances to them.