I have seen it done by a guy who did the welding himself, he made it really heavy duty. You have to worry about the weight that you're adding to the trailer axle and tires, especially since that weight is far away from the axle, it will exert force opposing the normal weight on the trailer tongue and hitch to the tow vehicle. Texas also has a limit on total length of towed vehicles, but you probably don't have to worry about that. I would say in general, I think you're asking for trouble.
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Hoop
2006 XR650R, the dual sport bike
2004 DL1000, the street bike