Hey.. nice to hear from you. The food you use is great!! But the bath frequency and brushing, kind of put me in the alarmed zone. Try taking time on your week off or some day of the week atleast for him. And now, more time needs to be invested on him for baths, so you will somehow have to work it out.
Where do you stay BTW? Will you be able to do early morning walks like 5am or so? Traffic is less and less ppl around may be? Try walking in pocket streets and not main road. Like all the shortcuts that you may use when on bikes?
Of sure, GSDs need a big backyard & place to move around and all that, for which case, all dogs need that lifestyle. I have an idea - if you feel it budget friendly or if you can make this in budget then buy him a treadmill. You can watch CesarMillan's(Dog Whisperer) videos on how to make a dog walk on treadmill, so tat reduces the risk of walking it off on these busy streets.
Exposing him to sunlight/natural surrounding seems a legit reason to not have hairloss :). Of course, I hadnt thought about that :(
Dogs have originated from wolves, so the traits of stalking?? Very much, dont be surprised :). As for GSDs, these are the working type, was used once upon a time for herding, so that comes by no surprise that he was stalking cows. His herding genes are still alive!!!
They have enormous speed and energy, coz of which exercising becomes your only option. Take him to terrace during evenings so that he can enjoy sunlight and experience nature and so. He should be fine soon. Just pick out your time for him. He is not like other pet dogs, he needs all this for him to be fit mentally and physically :)