Not true. OBL put more than a trillion dollar dent into our economy and vastly increased the risk-premium for anyone investing into the economy. Any comparison with illegal immigration is comparing apples and donkeys.
Any amount invested in our economy by him would have been invested by someone else if it hadn't been for him - unless for some reason he went out of his way, against economic gain, to lavish money on us. But if he didn't, then he was just the conduit, not the agent. But he definitely was the agent of terrorist attacks against us.
Truthfully, however, I don't know why you're even bringing that up, since it works against your argument.
I'll follow up in a second.
But I'll admit that I don't have the exact dollar figures to compare.