Guys of GAG, what would you do if your girlfriend rejected your proposal just based on the fact that the ring didn't cost enough?

Fun story, a good friend of mine proposed to his girlfriend, now ex, the ring was white gold, custom designed with diamonds and sapphires. It cost a total of 2500 dollars. She rejected based on how much it costs. She literally told him that unless the ring cost between 25k and 50k there was no way in hell she would say yes. And now she is homeless, because he kicked her out, changes the locks, and put her stuff on the front lawn with a sign "free to a good home".

Guys what would you do in his situation?
Guys of GAG, what would you do if your girlfriend rejected your proposal just based on the fact that the ring didn't cost enough?
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