DarkInspiration

Our prices for a one bedroom apartment, depending on location, can also go that high, but I think you might be conflating what “a bedroom” means here. It’s 500€ for a bedroom in an apartment, not the whole one bedroom apartment.

The free tier has all the features you need, it’s open-source and it’s not a Google product.

It’s also quite easy to switch to it from other managers, even the Google one.