financial aid appeal as someone who didn't get any aid

i know someone just posted about this, but does anyone have any ideas on how to appeal financial aid as someone with a high FAFSA SAI? since my SAI was so high they didn't offer me any aid initially. i sent them an appeal through the website, and i told them about how we have to pay for our grandparents abroad, but i dont really know what to do if they don't take that. no other school gave me need based aid honestly... and i already committed to yale. while my parents can pay for it, they would have to significantly change their current life to manage.

like there's gotta be some reason, or some way, that I can get a little bit of money off. even getting the bill down from $100k/year to $90k would be helpful.

im also a bit confused on how yale calculates financial aid, like when you own properties and stuff. is there anything i can tell them about this that would make them more willing to give me a little bit more money?