I also work alone on a Go service and have some complex models. I used Gorm and then for complex selects broke out the raw sql. It works okay, I’m still having to bolt on things like OCC and Versioning to my models. I’m glad I used it though- it gave me a solid foundation to work off and replace the bits that don’t quite work well.
I've chosen this path of using only sqlx on my current work project (only me) and regret it, because so much typing..