I would get a Pixie frog, or a pacman. Very easy to maintain. No filter for water. Just some clean soil etc. It sounds like you're looking for something low key and easy to deal with. At least while you're still with your family. I'd go with one of those two.
Plus I don't know about anyone else but whenever there is a frog in rescue and I hiccup (appearently I hiccup often and everyone finds it funny which doesn't help) all the frogs and toads start to bark. Just thought I'd add.
Rusty