I'd like to know the total amount of money due instead of just sending whatever the parent requests. I would like more parent content in general too. Honestly, it'd be nice to have an origin of 'rich kid' of not having any debt and going to the school on easy mode with an allowance from your parents purely based on how well you do in school and extra curricular activities. A flip on the money mechanics.
The official comment on the weekly payments - as written in the difficulty options settings - is:
"The weekly debt payments are designed to keep some pressure on so you have to work a job or find money, which generally leads to interesting events."
So while I find your suggestion very nice to have, I doubt this will be implemented very soon. If at all.