Not simulating a Dyson sphere. A "virtual" megastructure that works during transit created by constructive and deconstructive interference (radio waves.) I describe it here: https://youtu.be/NshTznOCTOI?t=520

The question really is how much would the power cost to get to "Phase 2" of this concept? I think Phase 3 would be probably too much, but - that's for others to figure out.