POWER LINE ethernet adapters, you can get a pair for under 50.00. Buy them from a reputible source so that if they don't work (not likely) you can return them without a hassel. Only plug them directly into an out let or EXTENSION cord no power strip or surge protector.
Wow, those look interesting! Never heard of them before, had to look them up on newegg, and they look pretty interesting, might have to look into those. However...Will they work on separate breakers? The garage has it's own power box, so would that still work?
Ubiquiti NanoBridge. They're about $80/ea. and you'll need two of them, but they work well and will go several miles with line of sight.
A little more expensive than was hoping for, but I'll et him know about that option as well
Thanks again for all the responses