We have something similar, but instead of a layer of crusher we buried several drums (open on both ends and filled with stone) then sand, then mats. We got a steal on mats getting them from a local semi-trailer company. They came in big rolls, were ones that had been pieced/riveted together, but were long enough between the jointed areas that they were perfect. It cost me about a 1/4 of what mats marketed for horses cost. They only real downside was that they didn't have holes, so with quite a bit of work and a few destroyed hole saw bits we made them work.
Life is like a camera. Focus on what's important, Capture the good times, Develop from the negatives and if things don't work out, Take another shot.