If your brother is too busy to go get one himself, I imagine he is too busy to set a bike up on it and then too busy to use it. Around my area a Cycle Ops Mag Trainer in good condition with little use goes for 50 bucks. I have two of them used, one for my wife and one for my daughter. They use them on a regular basis and simply listen to music and get a 20 minute spin.
I have a Wahoo Kickr and it rides like a bike, but I only use it to spin.