I'm currently having a new home built. The first thing I'm going to do when it's finished is build a home (shelter) for my 5er. I was thinking of just laying gravel under the shelter, but may pour concrete, depending on cost. Is there any advantage to one over the other? I'm aware that some people, no matter what the parking surface, put blocks under their wheels to get them off the ground. Not sure I understand the benefits of that. Does it protect the tires? Any suggestions would be appreciated.