The cheaper, easier solution would probably be just to get an electrician to wire up a high amperage 240V outlet just like your electric stove or dryer has, and then get a PSU that connects to that.
Would probably cost you $500-1000 depending on how difficult your home is.
The article stated that this was dismissed because the author lives in a rental apartment and he was not certain the landlord would agree to making this change.
I did not see any indication that the landlord was ever actually asked, it appeared to be the author's "sense" that any answer would be "no" from the landlord.
Would probably cost you $500-1000 depending on how difficult your home is.