Yes, 800 euro would be the max I could hope for I think. But as an average of ~500 euros improvement of my current "salary" and loosing at the same time 40h/we

Yes, 800 euro would be the max I could hope for I think. But as an average of ~500 euros improvement of my current "salary" and loosing at the same time 40h/week + getting tired and not being able to do intense intellectual things after work I don't know if it's really worth it. And as I said, I "earn" enough money to not have to use my saving.