The video Paul Barbara refers to is here.
Silverstein took the lease of the WTC complex only six weeks before the attacks, but he says that the plans for the replacement WTC7 were drawn up eighteen months before, in April 2000. So whoever had the plans drawn up, it presumably wasn’t Silverstein Properties. So the alleged conspiracy has to be extended, as they always seem to. This theory also needs yet more conspirators to arrange the attack on the Pentagon. One of my tests for a “conspiracy theory” is whether the alleged conspiracy has to be expanded without limit.
Paul, rather than just linking to that uninformative and rather anti-Semitic* video, I think you should do some research and find out who did have WTC7’s replacement designed. And as the video alleges that the attacks were essentially an insurance fraud, you should also find out and post how much it eventually cost Silverstein Properties to redevelop the WTC complex; without that information, the video’s claim that the insurance payout was excessive is merely malicious gossip.
* Anti-Semitic tropes from 04:00 onward – slowing Silverstein’s voice to make him sound sinister, and then repeating, with reverb, “but at least I got the money” over and over, because everyone knows that money is all Jews care about. Videos like this are an appeal to unpleasant emotions; you should link to documentary evidence instead.