Personally I don't think it is a good idea for you to get a dog right now since you don't even have enough money to get one. Having a dog, as you probably know, the cost is more than the amount you pay for the dog itself. There's also medical bills (especially for a puppy), food (but I doubt that would be a problem), and other extra unexpected costs. I'm sure if you want a puppy you want to give it the best and provide a good home so it'll grow up as a happy and healthy puppy.
But again, that is just my opinion. If you do decide to get one, I wish you guys the best of luck and I hope you do find a puppy thats right for u!