I think that the devs are trying too hard to fix the economy with new money sinks. While yes, they will help the economy, too many will only hurt it. Last I was in-game (A month or two ago), the economy seemed fairly stable as it was (I could be wrong). Increasing the base cost of using the day care is fine, but I say leave the price per level as is. (1k to 10k for them to hold a pokemon and then an additional 100 per level)