I think the idea that she can use the reception hall for a "future event" is a little far-fetched. I mean really, what's she going to do? Get engaged to someone else and schedule her reception in the same hall as the first failed marriage attempt? That's pretty much just a way for the reception hall to get out of retruning her deposit. But -- that's neither here nor there, just my opinion! Sorry!
The contract at the hall probably includes a time limit. They will probably allow the deposit for a different event if it is used within 18 months, 3 years, etc. It's probably not as if she'll be able to use the money as the deposit 20 years from now. I would say in respect to the hall, he should agree to pay half upon expiration of the contract,
OR with her agreeing to
NOT use the hall for a "future event," at which point she would owe his half back.
Perhaps they could come to an agreement about selling the dress, and then he owes her half of expenses
less the money from the dress. ie, say she has spent $5000 so far, including $1000 for the dress. She sells the dress for $800, bringing the total expenses to $4200, and he would owe her $2100. See?
I may be completely wrong, but it seems only fair that if the ring is a "contract," then all of her preparations for the wedding were her part of fulfiling that contract. After all, the ring was a family heirloom, so he didn't even have to pay for it. Yet she is out a lot of money for a marriage that he proposed then backed out of. I think the fact that he called off the wedding is key. I think paying half of reasonable expenses (dress, hall, church, flowers, ect.) is what he
SHOULD do, whether a court orders it or not. I beleive that with
HE being the person who called off the wedding, a court would order him to pay half, but would also order her to return the ring.