If your husband can miraculously find 900 next month, then I’d ask for that money to pay your medical collection. If that ER visit occurred during your marriage (did you not have insurance?), why didn’t he contribute to pay it to the hospital? It happened when you were married. He ignored it??? Went to eat in restaurants, bought pot, cigarettes, alcohol all while your bill went on collection? That’s not what should be happening in a marriage.

I’d accept his offer of 900 to pay debt collectors and explain to him why. No Id not be dating him but I would treat this medical collection is marital debt, which he’s partially responsible for as it occurred during marriage. Why be married if not even share responsibilities?