MoCA 2.5 is 2.5gbps; works great and inexpensive.

It's not at all like HomePNA in that it does not shit all over the RF spectrum. Please do not use these powerline bridges; they are awful in all respects and should never have been allowed to be marketed.

Also, doing the thing in the article isn't ideal either, though there are always a lot of interesting RF things to try with WiFi. Look into leaky feeders / leaky coax for instance.