Which dog breed is the best preferred by you for middle class family a Labrador or German Shepherd ?

Since they are big , they need bigger amount of food, bigger attention,a lot of shedding etc etc
It is better if you go with a smaller breed.
Also, if these breeds are not provided with proper nutrition their health starts deteriorating,
it would affect their bones, their shedding , their teeth, their whole health.

if you want a matured dog...gsd is better , otherwise their maintenance costs the same.