The amount everyones quoting is the full fat amount over the life of the contract.
You have to show you can do most of it yourself i.e raise the money.
After a %age deployment the FCC checks if you've met the deployment timeline and checks your speeds then starts paying you and keeps testing as you deploy according to the timeline.
It's like standing in front of a train and not moving because you asked the conductor to stop.
What happens when they reach 2025 and billions of dollars have gone down the drain? Why wait?