The stable ownership clearly states that investing in one of their horses is for ENTERTAINMENT purposes. Like playing golf is an expense or buying a boat. They don't hide this fact either.
Entertainment is the same outcome owning a % of a horse with any trainer.
Your chances of winning money after expenses is never guaranteed and isn't likely.
But rest assured, your trainer is doing fine.
The only real difference, you can usually count on a non Stable trainer, to acquire the services of the best driver available.