If you have the technology to reach the nearest binary blackhole ("you just have to pay the one-time fee of the cost to reach the nearest binary black hole syst

If you have the technology to reach the nearest binary blackhole ("you just have to pay the one-time fee of the cost to reach the nearest binary black hole system", at 16:12 min in this video: https://youtu.be/rFqL9CkNxXw?t=972 https://youtu.be/rFqL9CkNxXw?t=972 ), you can most likely deal with the mirror/energy harvesting problem as well.