Ayaneo Pocket Air is not budget friendly as that will cost you upwards of 400-500+. Unless you're going for the lowest RAM possible, which will limit what you can play up to. At that point, you should just get a Steam Deck, or Odin 2, which blows it out of the water. So between RP5, and 557, easily RP5. If you're just looking to play 8-16 bit and good amount of 32 bits like the PSX, you can just get a Miyoo Mini+, or RG34XX or RG35XXSP