I have always recommended that pups be carried from the crate to their "potty" place… at 12 to 16 wks, especially after waking up, there is no way they are going to walk all the way to a door, outside and onto the grass to pee... they just can't hold it that long.
For us, I didn't care if they peed on the concrete, in fact 3 of my girls go on the concrete... one on the grass and my one boy mostly on the grass. And for cleaning up, really vinegar and water works as good if not better then all the store bought ones I have had over the years, and believe me, I have tried them all... Works great on concrete, tile, pergo, carpets....