I would start with just a simple wall wart wifi extender plugged into an outlet near your streamer. Just plug in an Ethernet (good quality) cable to the extender. Streamers have very low speed requirements. Good quality streamers cashe the stream and isolate from noise and vibration. My streamers works flawlessly when my iPad will not refresh. I would not make this harder than you have to.
Real budget streamers benefit from working on the network. It is much easier to just get a good streamer. I recommend Aurender.
Both of my systems work this way and sound great (see my systems under my user ID). I know of many +$100K systems working this way providing high end sound.
