Maintenance will be impossible or at least prohibitively expensive. Which means your only opex is ground support. But it also means your capex depreciates over whatever lifetime these things will have with zero repairs or preventive maintenance.
But ground support will not be cheap. You need to transfer a huge amount of data, which means you need to run and maintain a network of ground stations. And satellite operations are not as cheap as people like to think either.
Even optimistically, capex goes up by a lot to reduce opex, which means you need a really really long breakeven time, which means a long time where nothing breaks. How many months of reduced electricity costs is wiped out if you have to send a tech to orbit?
Oh, and don't forget the radiation slowly destroying all your transistors. Does that count as opex? Can you break even before your customers start complaining about corruption?