No, that's not required. Only the major centers of economic power, the so-called "commanding heights of the economy", as Marx termed it, would be nationalized. Every industry vital to our nation's infrastructure, like the oil and gas/energy sector, nuclear plants, mining/mines, all local utilities (the individual states and municipalities should own them), banks/finance, healthcare (a private medical sector would exist alongside the public healthcare system), big pharma (becomes "Pharma USA" with reasonable prices), public transit (cross country and intrastate highspeed rails/bullet trains), telecom, the military-industrial complex (eliminate war profiteering), and a couple of other industries, would be publicly owned.
The revenue from all of the above major, heavy industries would go towards developing and maintaining our national infrastructure and paying salaries. The federal government, unlike the state and local governments, is the exclusive issuer of the USD, so it will always have money but it nevertheless, has to remain within its GDP limits. The budgetary constraints of the US federal government are defined by our national production capacity or GDP. So it's always good to use the profits from publicly owned industries when possible or even taxes, BUT it can nonetheless, always, provided it remains within its limits, simply fund everything with its yearly federal budget, which could be double what it is now based on our current GDP. I prefer to be conservative with funding whenever I can when I'm operating (planning, theorizing) within a capitalist, market system/framework, so that's why I offer alternatives to simply relying on the federal budget.