Not really. Or rather, compared to what?. You don't need to use centrifuges to separate large amounts of weapons grade uranium, rather you can make reactor grade, which is much easier, and then use the reactor to "make" plutonium. Plutonium, being chemically different from uranium, is *relatively* easy to separate from the remaining Uranium.
So you have to build a nuclear power plant, and processing facilities for the extraction of Plutonium which is so deadly even tiny amounts can kill you, the Plutonium then must be formed into the proper shape with machine tools. And all of this requires highly trained people to do and they don't come cheap. So how expensive is a nuclear power plant? And if the Iranian economy is no more, since without their oil wealth Iran has no economy, how are they even going to pay their bloated government.