I agree. It's not going to be possible to get that tone 100% in a home studio. I can get loud, but not that loud. I think the questions is: do you get closer on a 100 w Marshall with various mods (master, attenuator, extra gain etc.), or another amp that does something similar.Fantastic video. And even if you can get the tubes and everything cooking real good, at "reasonable volumes", you're not going to get the speakers working hard too, it's the sum of the parts for sure.
What I can rule out are lower wattage amps. I can get pretty loud in my studio without bothering anyone. I'm thinking I may do a loudness test and crank my Mesa to see how loud I can get before it becomes a problem outside my house.