The table legs are 16" tall
the table top is 26" wide by 82" long
frame out the top to those dimensions. Place bracing at approx. 16" on center
frame out the bottom shelf to be on the "inside" of the table legs and your leftover half of the plywood can be cut to size and installed below as a parts shelf.
Add some diagonal bracing on the legs to the top frame. Screw or bolt on your casters and your good to go!
A wheel chock and eyelet hooks can be added if you like and maybe some grip tape to make it really fancy.
Oh and dont forget the beer while your building it!
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