It's always had a financial price tag. It's just a question of whom pays it.
"To date, we have provided $65.9 billion in military assistance since Russia launched its premeditated, unprovoked, and brutal full-scale invasion of Ukraine on February 24, 2022, and approximately $69.2 billion in military assistance since Russia's initial invasion of Ukraine in 2014. We have now used the emergency Presidential Drawdown Authority on 55 occasions since August 2021 to provide Ukraine military assistance totaling approximately $27.688 billion from DoD stockpiles."
Not including USAF/USN support ops with drones over the Baltic, etc, up to Jan 20 2025 we supplied 3 Patriot batteries, 12 NASAMS, 3000 stingers, MIM-23 Hawk, AIM-7, RIM-7, AIM-9M missiles, Avengers, VAMPIRE c-UAS, c-UAS gun trucks most people probably didn't even know we had, 21 radar system, 40 HIMARS systems, GLSDB, 200 howitzers with 3.1 million 155mm rounds, 72 smaller howitzers with another million rounds, 31 tanks, 300 bradleys (the thing they needed more than anything as is the victim of long time Russian propaganda smears that even turned into a Kesley Grammar movie), 400 Stryker, 900 M113, 400 M1117, 1000 MRAPs, 5000 hummers (living their best life).. that's only the tip of the iceberg.
There's also the massive amounts of US military spending that's not accounted for in Ukraine spending claims. Drones flying over the Black Sea to track Russian ships, the vast surveillance apparatus that feeds Ukraine intel, everything it takes to support the US private space program that Ukraine's military cannot function without, etc.