Oh, Susie, I feel your pain. I have not conquered this yet (been at it for nearly a year). But I was able to stop the barking. I did it by training Lola not to bark. I live in a condo, so it was critical.
I did the leave for seconds, return, then minutes, return, over and over. The thing was, I would wait down the hall until she started barking, then I would wait for a break in the barking and come back in then with a reward. I also trained her to not bark when I am at home, by isolating her in another room until she would start whining and barking and then rewarding the not barking moments. And I added in a glass jar with 10 coins in it and when she would bark at the doorbell or someone walking by in the hall, I would shake it loudly to startle her and distract her from barking. I alsways said a loud "ack" which is our "no". I spent a weekend coming and going focused on the barking and was able to get her over it in that weekend. Now she just pees on the floor when I leave.
Give that a try. If you can get over the barking at least your neighbors won't freak. It may be that your neighbor understands, but she should not have to tolerate that hour of barking. That is not in your condo rules...
And maybe the effort will pay off on the SA as a whole.
I have continued the same work on leaving and returning for longer periods of training periods of three and four days on end. And it hasn't helped at all. I can get her to remain calm and passive when I leave, but within 15 minutes she will get up and freak out a bit and then pee or poop. And no amount of restriction helps that behavior. She did it in her expen and in her crate. Panicked elimination.
It takes a lot of effort. Worth it to have happy neighbors. I just wish I could guarantee you a happy puppy!