I would think just getting a cheap android and one of those kishi type things would be good enough? Unless youre dead set on controls on the bottom. Then you could get the 8bitdo controller with a clip-on.Whishing someone would release a cheap streaming device for mobile gaming. Screen on top with physical controls on the bottom, with limited hardware that's good enough to stream but probably couldn't run anything locally. You'd think something like that could be made a lot cheaper/smaller than the switch since you would be scaling down the hardware so much.