I'm trying to plan a semi-perminant floor in a 16x20 greenhouse-styled shed for upwards of 50 layers. I had thought of something I can just sweep and pressure wash off and replace sections if necessary. I've found a dealer of cheap puzzle piece crossfit mats. The soft rubber would be cushion enough at first thought. I could then sweep and spray and collect to water our garden. I see it saving in the long run and hopefully avoiding bumblefoot. Thanks in advance for any advice and please, any advice is helpful.