I found a website tracking and quantifying how far Project 2025 seems to be progressing. 

This market resolves to the overall progress percent as reported on the website when Trump is no longer POTUS for his 2nd term or when 11:59am EST Jan 20, 2029 occurs, whichever happens first. Official government sources will be used. 

If the website is no longer online when this market closes, then it will resolve to the latest snapshot from the Internet Archive that was taken while Trump was POTUS during this market's closing closing criteria. 

https://web.archive.org/web/20250000000000*/https://www.project2025.observer/

This market will not entertain arguments about temporary discontinuity of the Presidency due to the 25th Ammendment -- that won't count to close this market if Trump is still POTUS. 