Yes it would be. But with 6 mounts, 1" diameter steel, some skilled welding and a few reinforcement plates it shouldn't be an issue.

It's funny you mention that... because if Doc likes that and I decide to go that route I was planning on running an FEA to see what the stress would be at those joints with ~400lb (more than i'll ever load) on the rack to ensure the weld and whatever reinforcement we put there is adequate.