Apollo took 9 years and about $25 billion to get there, so we can treat that as an upper limit. However, the Capstop cubesat just reached the moon[0] for $30 million[1], the roughly $5 Billion for the LHC should be enough to get us to the moon these days. And we can bring back aluminum and titanium until commercial fusion arrives.

[0] https://www.space.com/nasa-capstone-cubesat-arrives-moon

[1] https://spaceflightnow.com/2022/06/28/capstone-cubesat-launc....