With "concrete type soil" everything more than likely will turn out OK. Makes a big difference. Here, once you get past the top soil roots you find soft "gold sand" as most call it due to color, one needs more of a heavy, solid base. One very good thing is it sucks up heavy rain very well.
Have fun with your "new" toy.
RT
Yeah, but you live on a captured sand dune, right off an OCEAN! (Lake Michigan) LOL.