I think what he has in mind is not something that would decelerate and enter lunar orbit. It's probably just putting a capsule into an highly eccentricity earth orbit that loops around but quite far from the moon.
However, even this still seem to me to strain the throw weight of his rocket. I am guessing you would need to be able to put at least 40-50 tons into low earth orbit to have a capsule able to keep 2 persons alive for 7-8 days and enough onboard fuel to slow and deorbit the capsule when it comes screaming back from its highly elliptical orbit, and a transfer stage that can push such an capsule into the elliptical orbit in the first place.
However, even this still seem to me to strain the throw weight of his rocket. I am guessing you would need to be able to put at least 40-50 tons into low earth orbit to have a capsule able to keep 2 persons alive for 7-8 days and enough onboard fuel to slow and deorbit the capsule when it comes screaming back from its highly elliptical orbit, and a transfer stage that can push such an capsule into the elliptical orbit in the first place.