Edit: the OP basically said the same ^^^^^
You can use Apple airport express, put it into your room, connect it wirelessly to the 'house" router (this would be "extending" the network), then connect your miner to it via ethernet cable. If you have more than one miner, then connect a simple ethernet hub to express, then connect miners to the hub.
This setup works fine and you can access it wirelessly from PC or laptop..