SJS:
That doesn’t bother me.
I don’t think a person is negligent towards klal yisroel if his learning precludes him from paying his kids tuition- in the present or in the future.
As far as your family’s needs, you need to be honest and also get advice from daas torah. Perhaps if you wish to learn, you should only date girls from wealthy families. That would narrow your options, but you need to be honest about what your goals are.