Antminer S3 and S1 are both WIFI. They both can be finicky but adding an external antennae usually sorts them out.
I wouldn't vouch for going for a WIFI miner though, and that bitmain decided to drop it for their (now EOL'd) flagship S5 is telling.
Thanks, I looked at the S3+, but it said it was Ethernet as well. Do you happened to have a link to someplace I can buy the S3 that comes with WiFi?
I share internet with my neighbor and do not have physical access to the router, so I need WIFI.
I'm not sure why they would drop it from their product line, as it's always better having more options, especially with a standalone unit.
All S3's come with WIFI in addition to an ethernet port, but because they are enclosed, the connection tends to be unreliable, however, that can easily be fixed by adding an external antennae (which should cost around $5).
You can also get a router yourself and bridge it with/to your neighbour's router then connect your rigs to your router.
There are loads of S3's (and the variants) on sale on ebay, amazon, gumtree etc, just do a search on any.