If you and your spouse are willing to work together, you can avoid the costs of service by doing one of these things:
In an uncontested divorce, the spouse designated as the Respondent (the one being served) can sign a Waiver of Service Only, filed at the same time as the original Petition. This is what's called a Specific Waiver, meaning it has a specific purpose. In this case, it waives one's right to be formally served. The form must be signed in front of a notary public at least one day after the Petition was filed with the court.
If the Respondent is willing to fill out and submit the Original Answer form, they do not need to be served. This form does not need to be signed in front of a notary.