Yeah it’ll take a lot of money for sure. Needs new propulsion like nuclear thermal or something to get to target distance in our lifetimes.
Would be very expensive but I think cheaper per mission, if you start off with a plan to send a lot of them.
Might take in full some tens or hundreds of billions. YC I am aware will not fund on that level haha, but maybe they would have an eye for wanting to start it off.