Your answer is actually perfect and sounds most natural. Without any further context, I think it's the best one.

The costs of legal representation consist of what you have to pay a lawyer to represent you at court. Enforcement proceedings refer to a legal process to enforce another party's obligations that have not been fulfilled. If this makes sense in your context, then I would use your option.

Here are some examples of the term "enforcement proceedings" being used:

https://www.osc.gov.on.ca/en/Proceedings_faqs.htm

"This is not a legal document and does not give any legal advice. If you have questions about a matter that involves you, consider contacting a lawyer or paralegal. If you are involved in an enforcement proceeding, you may be eligible to apply for a volunteer lawyer to assist you through the Litigation Assistance Program (the “LAP”)."

https://ca.practicallaw.thomsonreuters.com/1-619-0729?transi...

"Enforcement proceedings are usually brought on notice to the party against whom the judgment or order is being enforced.
The procedure for enforcement will depend on the nature of the judgment or order being enforced as well as the method of enforcement, and will be governed by the province's or territory's rules of court/civil procedure, provincial/territorial legislation and/or the common law. The length of time that enforcement proceedings take will depend on the method of enforcement."