That would mean around 2000 USD per person per year if taking the full US military budget and paying everyone.

But this is much better than subsidizing home ownership for the rich.

Please try to do some actual math here. What annual UBI are you targeting, and how much could be funded from pillaging existing spending vs. new taxes?

We did this during the pandemic and it resulted in inflation that we're still trying to deal with. Exactly the kind of inflation that detractors claim would happen.

Safety net, yes. UBI and other redistributionist fantasies, no.