Hi Anne - call up Karen Hudson Brown, who carted her Z kit all over the place
alone, or mostly so, with the help of a sort of dolly which fits over the end.
And you can probably tip it down by yourself if you put the tail end on a
padded sawhorse, then tale the tail leg off - you can just roll it over, with a
cushion on the floor.  Or, as you say, a slightly raised cart.
        Best, Margaret