Rotisserie Build. Will it hold together?

I may find a 10 foot pipe that slips into the pipe legs, tap some bolt holes in the outer pipe, weld on a couple nuts and just cinch to the inner pipe
I want them tied together strong cause I am going to have a bracket for a 8 or 10 foot rigid tow bar on one end of the rotisserie at the base so I can drag it around in and out of the shop and if needed push it up a ramp onto a trailer.

I am just starting on the fabrication type work, so learning as I go.
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Yon need it all hooked together to stop the flex on the cars body since it is a unibody. I have had seen doors not fit and many other problems from body flex from non linked ends.