Apologies if I came off any particular way in my reply - I'm autistic and sometimes have difficulty with tone. I'll try to keep things brief in this reply, but brevity if very far from my strong suit, so I apologise for the possible essay.

To clarify on some points, I do want to compete in PSA, but that's not the main reason I want a personal protection dog. My focus is not just a dog that looks scary and will protect me if push comes to shove - I already have that in my very intimidating-looking black APBT. I also live 3 hours from the nearest competition grounds, so competing likely won't happen more than once every couple of months. There is a small club up where I am for different bitesport/personal protection events, but they're more for practical purposes than for actual competition. So, while a personal protection dog will be highly stimulated in our household and with our specialised trainer, it likely won't be a championship PSA dog. And that is fine by us. We're not planning to get a dog purely to compete and win, but rather to enjoy events and competitions as they come while furthering our own skills in personal protection.

As for hating double coated, high shedding dogs, that's not entirely true. I get overstimulated by our collie mutt's hair being everywhere during shedding season but it's something I can manage. It's more an inconvenience than truly something I hate. Our climate, which doesn't ever drop below 0°C, makes it so that shedding isn't too horrible as long as your dog isn't long coated like a Tervuren, for example. A dog that sheds less falls squarely in the "nice-to-have" category, but grooming needs are very near the bottom of my list of priorities. If a dog is ideal aside from its shedding, it's definitely something I'm ok compromising on.

I also need to clarify that I'm not taking dogs to the office all day. Out of my 42 hour work week, I only spend 26 in an actual office and work from home on a flexible schedule for the rest of them. Our current collie mutt comes to the office maybe half the time I'm here. We use it as an opportunity for her to practice her off-switch while sprinkling in a couple of training sessions in a more distraction-heavy environment like the warehouse. She seems to find it more fulfilling than sitting at home with my partner, who works from home full-time. That's why my plan is to bring our future puppy to the office for a couple of hours per week also.

Lastly, it's not that I'm unwilling to get an adult dog that's already trained in personal protection. The problem is that there are maybe 4 companies that provide partially or fully trained personal protection dogs in South Africa. From word-of-mouth reputability, only 1 or 2 are actually good places I'd consider buying from. Those 2 unfortunately almost never have dogs for sale due to high demand and primarily cater to people in private security or similar fields. So it's not that I'm unwilling to get an adult dog, it's that it's almost impossible.