They do have some 20-30 Base-T networking components you could put together now. 10-base-T isn't too bad either. It mainly depends on how you have your network setup, and your drawing files set up. If you drop stuff from a server and work on it locally (with a local parts library). . .wireless is the way to go. Besides. . ..pln files aren't THAT big.
There is also a BIG security factor with wireless networks, so before implementing one. . .do your research!!! 😉 Otherwise. . .little Tommy will bring down your servers faster than you can say "Where's my data?!!"