Seems good to me, if the math is science is correct then yeah should work. Like they said the problem is power generation but if it only needs the mass of the Voyager 1 probe in energy then that isn't outside of the realms of possibility. I would assume that to generate something like that you would either need a highly efficient hydrogen power source or nuclear power both have their flaws. But I'll be keeping an eye on this with great interest as if it works this could be the next big thing that changes the world forever. Alpha Centauri in two weeks? Mars would take minutes to get too, this is serious colonisation possibilities here.