ISO: Puppy/dog (Great Falls)

Hi all, I am looking for a puppy and/or a very, very, trainable, calm dog.
I will be quite picky as I’m looking for a new dog who has strong potential to be a future service dog(other is retiring soon).
Please pm and send me pictures and if you have a small rehoming fee(I want to throw in there I cannot afford a big price tag for your puppies that y’all are sending me, broke, college kid here, yes I can afford regular doggy care, but I’m not looking to spend thousand/s on your puppy that may or may not work).
Not trying to be mean, just honest.
I’m located in Great Falls, but willing to travel to meet the right one! Thank you!!!