Well, if you go to Epson (Germany) site you can see the car for the 4900; it clearly has wheels.
I actually like the Ikea Varde drawer unit, which assembled quite easily, has glides on the bottom and will slide without wheels, and cost $300. It is quite solid and sized nicely for the Epson 4900. One caution: The top drawer is not as high as the other two, which I did not realize. That made me reinstall the glides for the top drawer, so my smaller drawer is now in the middle! I will probably reinstall the glides for the drawer and put the smaller drawer on top, as intended. Maybe I should have known, but there was nothing in the instructions indicating a difference in drawer sizes. Here is the link to the unit:http://www.ikea.com/us/en/catalog/products/90049200