Maybe. My thought has always been that if fusion is close enough to get ballpark figures, we can build the necessary infrastructure and much of the housing in parallel with fusion development. Because the energy distribution will impose novel demands on the grid, it's going to require a major rethink on communications protocols, over-generation procedures, action plans on what to do if lines are taken out.
With fusion, especially, it's expensive at best to learn after the fact. Much better to get all the learning done in the decade until working fusion.
With all that in place, the ramp time until fusion is fully online at a sensible price will be greatly reduced.
Parallelize, don't serialize. Only shredded wheat should be cerealized.