With plastic and resin buildings like the one I have, EASY to hose down. Take a old plastic broom and have a go at it moping up everything!
I use diluted bleach and water or diluted vinegar and water or if I had extra money, I use Trail or Nature's deo (diluted as well). It didn't take long to dry on a hot day and then dust it with poultry dust or Stall Dry (which I used for the photograph).
It really paid itself many times over, even three times dismantling, six times wash downs and the only thing needed replaced was the wooden foundation. I made the mistake putting the foundation on top of the patio blocks, then sewer rats came in and started gnawing underneath the floor. I had to get it propped up on concrete blocks. If I find more holes, then hardware wire on the bottom of the foundation and "present wrapped" the floor with it as well. Then put the rubber mats on top of it.
You have to do comparison shopping on horse rubber mats which cost $40 for a strip while truck bed mats are roughly $25 dollars a piece for a 4 x8 piece.
I recycle my old holey rubber mats I had earlier, perfect for garden pathways!
I highly recommend rubber stall mats, shovel proof and it don't gouge if you have something very sticky on floor. Lino floors, I've had people saying they peel off or they made an oops with their shovel, ripping it or made a hole, etc.
Now if they can make concrete foundations that you can move things around, but sturdy to handle a shed's weight, I would go for it. They haven't come with a "portable concrete foundation" yet.