I'm trying to hookup my son's computer on the internet by using a wireless connection from D-Link. I've been told I need a "repeater" or signal extender in the house as there's a concrete wall between my router in my home office and my son's bedroom. I can't rewire the house as I was recently discharged with only one leg so crawling around has it's challenges. I would like to keep this operation as low cost as I can get away with. I saw all different options on "EGG" but need a bit of assitance choosing the best option. Any ideas?