I'm assuming that you'll be TTing to the day of their move-in? That should be fine. I TTed ahead after adopting a villager, and there was a confusion between my in-game clock and my 3DS clock, and I ended up traveling a month ahead directly after getting back to my town from adopting a villager, though I meant to travel forward a day.
Even then, there weren't any problems. I just made sure to check with a new character first and my new villager's plot was there waiting for me.