"Why are you outside the market for drinks, exactly?"

"Because I can make arbitrary material objects."

"...woah."

"It's very convenient."

"Yeah, I bet. Once we get the Statute repealed want to come over and 2179 us?"

"I would really, really like that, but I am not sure how it interacts with putting several million more Elves back and then going to another planet and putting more people back."

"I mean, even if everything goes exactly the way I dream I'm not going to be Minister of Magic until I'm thirty and repealing the Statute'll probably take longer than that."

"I am not sure how you get me to 1802 With Added Wizards in a few years, is my point."

"Oh, do the doors not last?"

"If they do I'm going to have to carve a hole in the wall of my little building to get out to the garden and put Elves in it. Bar?"

The doors do not in fact last.

"Does the alternate universe version of me perchance have people under his command who'd be willing to hang out here full-time such that doors are reliably accessible - does that work, Bar -"

Yes, but unless the door is open to a particular universe time does not pass therein while a patron therefrom is inside.

"...so no one's wondering where I am, yet?"

Correct.

"...huh. Okay, I'm keeping a door on my end at least through N.E.W.T.s."

"And yes, he has lots of people, he's a prince, he sent some along to help acclimate reembodied Elves so I can just do full time resurrection - newts? Are newts an event? Is this like porcine dermatology being a school?"

"They're an abbreviation for Nastily Exhausting Wizarding Test, they're the exams at the end of school and they're a week straight of really exhaustive testing and I can cheat at studying for them so much. ...I should probably check the bylaws to make sure it's not actually considered cheating, I bet they have rules about time-travel but I doubt they prohibit using it to study more between exams..."

"And you have lots of people who will continually hold this door for you?"

"I am not a prince but I could totally convince people to hold a door to a magic room in shifts."

"...well, at any rate you might have trouble keeping access until you're ready to drop 2179 on 1802 With Wizards."

"It would probably be a little bit of a challenge but it'd surprise me a bit if it were insurmountable. Magically hide this wing of the school, have my grandfather kick up a fuss, Slytherins take that kind of thing very seriously and would be meticulously reliable - or I could have an elf do it -"

"Huh."

"Yeah, come to think of it the easiest way would be to tell the administration and then assign some elves, assuming doorstops don't work."

"Incidentally part of it being 2179 normally involves slavery being abolished but maybe the magically bound elves are more complicated somehow."