Geez, I don't even know where to start on this thread. There is so much to owning a dog, if you do it right.
I think a pp hit the nail on the head when they said a dog is a living being, not really a gift. The dog's needs have to be taken into consideration as well as the people bringing the dog into their lives. (Some people may disagree with that, but probably not most responsible owners today.)
The biggest thing that needs to be recognized, besides the fact that YOU will very likely be taking on ALL of the responsibility for this dog as time goes on, is that you HAVE to understand what a given purebred dog (or mixed breed with some known heritage) was bred to do because instinct is strong and you can't make it go away if and when related behaviors get tiresome or annoying.
A Samoyed is a WORKING DOG!! It is not the type of dog that is going to be content lying around or tied out on a run in the backyard.
A description:
"The Samoyed is a substantial but graceful dog standing anywhere from 19 to a bit over 23 inches at the shoulder. Powerful, tireless, with a thick all-white coat impervious to cold—Sammies are perfectly beautiful but highly functional. Even their most delightful feature, a perpetual smile, has a practical function: The upturned corners of the mouth keep Sammies from drooling, preventing icicles from forming on the face. A Sammy sentenced to solitary confinement in the yard is a miserable—and destructive—creature. These are smart, social, mischievous dogs who demand love and attention. Sammies need a very firm but loving hand in training. As pack animals, they must learn early who the alpha dog is—and the alpha dog must be you."
https://www.akc.org/dog-breeds/samoyed/
Another, view Temperament:
https://en.m.wikipedia.org/wiki/Samoyed_dog
In other words, in order to have a sound dog you are going to have to commit to a lot of exercise of body and mind. Otherwise, you will have problems. If you don't give a dog like this a job, they will make their own job. That translates into digging, barking, sometimes biting, whatever it has to do to get rid of the excess energy they instinctually feel. Especially when young. (I experienced this myself with German Shepherds most of my life, and had to learn to channel that working energy in order to have a well-behaved house pet as opposed to a working herding dog.)
With that in mind, in this situation I doubt this is the right type of dog for your family, or for your daughter RIGHT NOW. Some day she can get one when she has time to perhaps run or hike with it regularly, or do agility or frisbee, etc. I think, as some other have pointed out, that you'll be happiest with the type of dog you're familiar with, i.e. a laid back, older dog who is not going to make you tear your hair out. God knows there are plenty of them around who need homes (and many here have given multiple great suggestions of where to find them).
I like to tell this story which I think illustrates the point that it's important to have the right type of dog in order to have harmony in the relationship. In our training group, every week this elderly lady would pull up with a young BORDER COLLIE jumping all over the inside of the car, including ON HER, while she was driving. The trainer would shake his head and say, "That's not the right dog for her".
I mean, I seriously worried this lady was going to have an accident! And she could not control the dog's exuberance out of the car, either. Again, a working dog with high energy who needed an outlet to let that energy out.
Picking the RIGHT DOG is the most important thing that you do at the outset. And putting a lot of time and thought into what you're getting into, as you are doing.
I would also suggest getting a copy of a book called, Good Owners, Great Dogs. It's my favorite book on dogs, and it will help you understand how to have a great dog. Do yourself a favor and read it before you commit to anything.
I understand how hard it must be for your daughter to want a dog. I have a good friend who tells me that every time I see her about her son (college age) who also desperately wants a dog, but she won't get one because she sees the writing on the wall, and knows it's not what SHE wants. She feels bad about it, but she's being realistic. She works full time and takes care of an elderly parent, etc. She'd also have to put up fencing, etc.
I actually wonder if your daughter(s) is trying to make it easier for you and perhaps take some of the burden off of them if they know you'll have something to love when they leave. Just a thought. And I actually think it might not be a bad idea - IF you have the right dog.