IngramSpark works with several publishing associations who offer promotion codes to their members to use for free title set up and free revisions for print and ebook titles. Many times, the offer of free title setup and free revisions more than pays for the membership fee. Check out their websites and see what they have to offer.
Independent Book Publishers Association (IBPA) https://www.ibpa-online.org
Christian Small Publishers Association (CSPA) https://www.christianpublishers.net
Nonfiction Authors Association https://nonfictionauthorsassociation.com/
Alliance of Independent Authors (ALLi) https://www.allianceindependentauthors.org
The Small Press Network (SPN) https://smallpressnetwork.com.au