Your math is wrong. Not the actual numbers, but the way you apply them. Your idea is to build big power plants rivaling what you know from steam turbine powered based power plants (how the steam is heated, coal or nuclear or fusion or whatever the heat source du jour might be, is completely irrelevant). But that's not how Wind and Solar work. If you just cover the public parking spaces of Houston, TX with solar panels, you would not take a single farmer's land, and still, you would be able to power the whole city of Houston. It begs the question though why Houston needs that much parking, and if that's not the real waste of space. By the way, that's what Portugal does with parking spaces in the country - cover them with solar panels. It cools the tarmac below, improves the ambient temperature in the towns, and generates energy. And you can build glass houses with solar panels instead of pure glass sheets. There are solar panels which have 50% transparency. They provide enough light for the plants in the glass house, and still generate surplus electric energy.
Denmark started with wind turbines 40 years ago, and now, Wind accounts for more than 50% of Denmark's electricity generation. In Germany, Wind accounts for 30% of Germany's electricity (the high prices for electricity in Germany have very bureaucratic, and quintessentially German reasons with braindead legislation, but that's another chapter). Ah yes, biogas currently generates the same amount of electricity in Germany as Nuclear did the last year before it was switched off. And then there is balcony power - a concept completely alien to the U.S., but widespread in Europe. For about 300 EUR, you can get a small do-it-yourself solar power plant, and legally assemble it yourself and plug it into your wall socket (any wall socket will do). No licensed electrician required. It's limited to 800 Wp - but hey, free energy for everyone. In a town with 10,000 apartments, this would be akin to a 8 MWp power plant for the price of 3 million bucks - without any tax payer money. If you want to pay an electrician, buy 10 of them. Or 30. And he will do the connection to the grid. For 10,000 EUR, you get 25 kWp solar power, which should cover most of your electric energy needs. If the 20,000 households in a medium sized town would do it, we are talking 500 MWp. That's the usual size of a nuclear reactor.