It really depends on how much you can tolerate. I don't know if full time is 40 hours in Germany like it is in the US.
If you have an option to try it for some time and fall back to plan B, why not do that? Then you can tell if the money is worth the extra work time.
Unless I misunderstood what you said, that's not it either. 50% chance of rain means exactly that: according to their forecast models, there is a 50% change it will rain. Snopes did a writeup of this.