I'm poor. Harbor Freight special (not bad for $250). Does hold two...well, it held the V-Strom on the haul back from Missouri and my CB750 project was in pieces scattered all around the Strom. If I extended the deck width and braced it, I bet it'll hold two side by side. At least it folds in half and takes up less space in the 1 car garage.
It also tilts to help load. Only did that once when I loaded the Strom. About sh*t myself when I passed the tipping point trying to hold the bike.