I'm sure you could definitely work something out, maybe you could go home on your lunch break to let the dog out to potty and play for an hour during the day? Along with walks/exercise/play in the morning and evening, most adult dogs would be perfectly happy. Rescues are the BEST! You can find an adult dog with the personality you want, and you will already know their exercise requirements, get a house-trained dog, etc. There are always LOTS of Labs and GSD's or mixes of those breeds in shelters in the U.S., Im sure its the same in Europe. Good luck finding the perfect pup!!