BLM wants everything decriminalized.
They want Police Narcotic units executed.
Thats the Big Picture, but with Politics, they hide the ultimate goal.
This is just one objective before an Election.
"
What is the Cost of the Bill?"
The answer to that question is shown in
comment #4, if such a bill were to pass.
It won't pass through the Senate or the President's desk, though. It's only a warmup for getting it to pass, if the Democrats are elected. And as seen in the manifestos of the new Democrats and the politicians in their single parents' pockets, it won't stop with marijuana.
The Democrats and their most influential new constituents will continue their push, until every freedom is violated. They'll push, until all good Americans are disarmed. They intend to leave the U.S.A. in ruins and allow the world's oligarchs to enslave our descendants.