If you want to retain a lawyer, I expect you'll find any number who will accept payment by the hour to perform this type of work. I have no way of knowing if the amount of money involved would justify a four to five figure legal bill.

You are free to try to negotiate with the plaintiff's firm about a stipulated judgment with or without a payment plan, or (if permitted in your state) a payment plan backed up by a confession of judgment, or anything else that is mutually agreeable.