Your issue is that the claim you can only get your treatment in dental facility in your husband's town isn't even remotely sufficient for any kind of emergency.
If US was the only country where certain procedure is done, it could sound feasible, but coming up with some weird combination of specific facility that is conveniently located in your husband's town and additionally a payment plan isn't something that anyone would ever take into consideration. Which is what others are trying to explain to you.
I'm sorry you're not hearing what you want to hear, but this isn't going to change the situation. You can always apply and see what happens.