Your passion for them is gone. Priorities in life change. Clearly, based on your post, your priority isn't snakes. That's ok, nothing wrong with that at all. But that you've begun to neglect your snakes is a problem. I'd say it's definitely time to part with them. For whatever reason you're not giving them the level of care you expect yourself to provide. Give/sell them to people who can and will. Keep one as a pet if you like, but get out of the business of snakes.