Bro just buy gym-grade puzzle mats. That's what I used for my garage. Cost me $200 to cover the entire thing. As a bonus I stopped it 8 feet from the doors, added one square's worth of length (2 feet) instead of the end pieces that just fill the jigsaw to make it smooth, cut that final bit in half (1 foot) and then pulled it upward 90 degrees. Acts as a barrier at the end of the floor, interlocked with the rest; prevents shit from the lawnmower and snowblower from getting on the gym floor if the doors are open on a windy day.