Curt, I am working on the same thing and have gotten as far as listing the "12 in '20" bills plus Trillion Trees Act, names, descriptions, sponsors, #co-sponsors by party, and En-ROADS levers to model. I still need to get more familiar with the bills to know what they will actually do. Would be glad to share research with you.
Here's what I've come up with so far, written up in a Google Doc. A couple of scenarios, "moderate" and "maxed out" in where these bills could lead. What do you think? Email email@example.com, or we can keep discussing on the forum here.
I've just been asked by a local business leader, who's well connected with conservative politicians and active in CCL, for help modeling the recent (Feb 2020) House Republican climate proposals, as summarized in https://thehill.com/policy/energy-environment/482772-house-republicans-propose-carbon-capture-and-sequestration
In a few minutes research, best rollup of details I've found so far is in this American Enterprise Institute position paper (setting aside the denier framing), pp 4-6 https://www.aei.org/wp-content/uploads/2020/03/A-Critique-of-the-House-Republican-Climate-Policy-Proposals.pdf
If anyone's familiar with the details of these bills -- or even better, has taken a crack at them in En-ROADS! -- I'd like to connect.