Nah. Adopt don't shop doesn't work anymore. Shelters are completely full of fucking pit bulls and pit mixes that "need to have their family all to themselves" and will lie abput bite history and health to get dogs out of there. Rescues pull the rest and sell them for hundreds. The odds of getting a good dog right now for cheap are very slim unless you have connections.
If you want a predictable, stable companion dog first figure out and research breeds that fit your lifestyle and then start looking for breeders. There are breeders that really really care and put in the work and money to make sure their puppies are going to be healthy and of good temperament. Finding them is the hard part, because most don't advertise on the web but you can contact them through breed club listings by email or phone. Dog shows are a good way to talk to people and find good breeders too, of course. And by dog shows I don't mean the one in the OP.
The dog breeding world is now a more or less closed off place because of the vilification of breeders. But if there are no breeders, there are no dogs. All dogs come from humans in one form or another, you just need to find the trustworthy people who make that happen. There are actually some breeders who will adopt out their retired show dogs to people if you don't want a puppy, too. You as a buyer or adoptee need to put in the work and communicate with people, you can't just expect a dog to fall in your lap.
Sorry for the autism, I just feel like most people don't understand how it is with dogs these days. It used to be easier before pit bull breeders and owners ruined everything.