There are a lot of ways to do this, and likely any of the wifi repeaters on the market that get good ratings on amazon should work for you. 100 feet should not be an issue, when you are talking 300,500, 1,000 feet that is when things start to become challenging. I use a simple $20 GL inet MT300N-V2 as a repeater to get internet to the workshop shed in my backyard which is just over 100 ft from the house, of course it is 2.4 ghz only, though to be safe it would probably be better to buy the slightly more expensive version with external antennas GL-AR300M that sells for $45 on amazon.