Actually, I had a dog that went through 5 crates, 3 wire, and 2 airline resin crates. Broke her tooth on it and could have hurt herself badly. I am not sure if it was separation anxiety. But she would only try to escape the crate if I was not home. If I was home, she was perfectly happy to be crated in the house.
Moving her to an outdoor kennel solved the problem. She did not acting out in the kennel. So I suppose it depends on the dog.
What you need to consider is the base, if she isn't on something solid, she will likely dig herself out. And you may have to consider the top. You can use some wire mesh to go over the top if she is a climber.
The kennels that you have there, and rather small. 4'x8' is kind of small for a GSD, and 350$. For a similar price you can get a 5'x10' kennel from Tractor Suply Co., and you can buy a couple extra pannels for $75 each, to make it 5x15' or 10x 15'. 10x15' is a good size for a GSD. My current smallest kennels are 7x10 and 8x10, and they are in my opinion too small -- working on a project to remedy that.
Using your home as one of the sides is possible, which also gives you more room, but GSDs can be pretty wicked to the siding of the house, so you will have to determine if that is likely to be a problem.
Jenna, RN CGC & Babs, CD RA CGC HIC
Heidi, RA CGC
SG3 Odessa, SchH1, Kkl1, AD
Ninja, RN CGC & Milla, RN CGC
Joy, Star Puppy, RN CGC
Dolly CGC & Bear CGC