g. in official or legal documents. The word "mom", on the other hand, imparts an informal tone to your sentence, so there is a bit of a mismatch there.
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"defray" can be used when an individual pays, but it is a relatively unusual formal word used e.g. in official or legal documents. The word "mom", on the other hand, imparts an informal tone to your sentence, so there is a bit of a mismatch there.
As a separate issue, "the costs of my college" is probably not ideal phrasing. "my college fees" would be more usual. E.g. you can say "My mo
You could say that, but it sounds odd and old-fashioned.
PS - I agree with GPY.