From all I've read of Rossi, he doesn't have the financial resources from his own wealth to operate a scam employing many other people. So unless we start by assuming that everything about Defkalion, Leonardo Corp, Hydrofusion, Ampenergo and so on is internet fakery (with few or no employees or physical locations, etc.) this has grown larger than what Rossi could have managed.asdf
Here is a summary of what I've dug up regarding Rossi's business arrangements in the United States...
HERE is the website for Rossi's company, Leonardo Corporation. Note the address and phone number.
HERE is the incorporation document for AmpEnergo, the American distributor of Rossi's E-Cat. Note that there is no real information other than an email address. HERE is the business entity document from the state of New Hampshire. Note that they have the same address as Rossi's company. There's no sign of a public phone number for this company.
HERE is the website for the founder of AmpEnergo, Karl Norwood. Notice that it's the same address and the same phone number as Leonardo Corporation. They have shared the same address and phone number for at least a couple of years (based on earlier versions of their web pages saved in the Internet "Way-Back Machine", http://archive.org).
HERE is the Google Maps page for that address. It's a profession office building, with rented offices and basic office services (kitchen area, copy machines, etc.). There are at least 24 other tenants of this complex, and none of them share the same phone number. So, we can rule out the phone number used by Rossi and Norwood as being a common phone number for the complex.
HERE is the brochure for the office complex, which happens to be managed by Karl Norwood. Notice that these are just generic office spaces, generally rented out to insurance agents and other similar businesses.
Rossi claimed to be manufacturing E-Cats in his Florida facilities. HERE is the incorporation document for Leonardo Corporation in Florida. It's a 5th-floor apartment, so it isn't likely that this is the manufacturing facility. Note that Nickel powder (which Rossi claims is the key ingredient in his "catalyst") is poisonous, so hopefully he isn't building them in a residential apartment building.
What conclusions can we draw?
I would love to do this kind of analysis of Defkalion (which was created specifically to sell E-Cats), but I don't read the native languages, and it's impractical to do this kind of research through Google Translate.
When I said "HERE is the incorporation document for AmpEnergo", what I meant to say was "HERE is the website for AmpEnergo".
It's understandable that they might want to be secretive at this stage of the game, either to hide from competitors/spies or hordes of Ecat groupies (which would be a real distraction). But I agree, the lack of a solid physical footprint looks suspicious.
He also has an Italian web site (his email on the American site points to it): http://eonsrl.com, but this site has been "under construction" at least since February 2010.
None of this indicates fraud, but it does indicate that this is a much smaller operation than everyone seems to be assuming (to your point).
It's Rossi's significant history of racketeering and fraud (described HERE that makes me think this is just another scam.