As long as your relatives have space and understand what they're in for, the only thing that would be difficult might be the transititions. Be prepared for some set backs in potty training when the environment changes - which means, when you go home, pay WAY more attention to keep your puppy doing his business outside...
Take him out frequently way more than you did before! Other than that, it'll likely be fine with the pup, and you all besides! Congrats on your new puppy!
It's not the size of the dog in the fight, it's the size of the fight in the dog. Mark Twain