Having one puppy is a lot of work, and most people find trying to raise two puppies at once a bit overwhelming. But, of course, not everyone feels that way. You need to decide how much work you can handle. If Snoppy is your first dog, I would recommend that you wait until she is an adult before getting another dog. Welcome to the forum. I hope you'll stick around.
"Out of trouble" is a matter of perspective. They would probably enjoy each other's company, so from their perspective, having another puppy around would be a plus. However, you will have a more difficult time training the pups because you will have trouble figuring out which pup is developing which bad habits unless you actually witness a no-no in progress.
From personal experience I would never have 2 puppies at the same time again. It was twice the work. Loads of fun but trying to house train, crate train, and teach everyday normal comands was next to impossible. All they wanted to do was play with eachother. House training was prolly the hardest part of it all. Training 1 pup to house train is hard enought sometimes now times that by 2! I nearly went crazy! But this is just me everyone has their own experience's this was just mine.
I am totally confused as what you are trying to ask here. You already have 2 pups, you have 1 want another one, or want to give this one away and get a purebred? Personally if you want to give the one you have up for the sole reason you want a purebred you don't need another one to beging with! Also, How old are you?