Finding a good free option can be tough, but it's not impossible! While I don't have personal experience with any free PIMs, I came across this article listing some of the top PIM systems. The article might give you some ideas about what features are important and then you could evaluate a free one to see how it stacks against the top of the line. Check it out: https://www.techyflavors.com/2025/03/discover-top-10-product-information-management-systems.html. If the open-source version is well-supported by the development community, it might be worthwhile to start there. Remember, setting up any PIM system takes investment in time to learn and configure.