Comment by probably_wrong

No, we really can't send something like that now. Or at least not if we want it to be useful on arrival.

I'll make an educated guess that, as of this moment, there are zero functioning swarms of humanoid robots recharging on such a reactor on Earth.

Once we add radiation shielding, software and hardware reliability, landing (marsing?) it all safely and deploying it (among others) I wouldn't be surprised if the earliest arrival time is, unsurprisingly, 20 years in the future.