At this point, Helium 3 is a pantload.
They can't even get deuterium and tritium to break even, and it's not like there's a shortage of those materials. Helium 3 is much harder to fuse.
Helium 3 has the sole advantage of creating far fewer neutrons. While this was a great thing back when I was looking at fusion rockets (charged particles can be directed out the back while neutrons go wherever the hell they want), I'm not sure it has real power plant issues. Neutrons can be used to generate heat, and the isotopes created can be dealt with.