Hi!
Well, what ordinance do you have? If you're TTing only a day or two at a time, you'll have to water all your flowers a lot if you don't have beautiful town. If you don't have it I would definitely tell you to get it before you start TTing regularly. If you have beautiful town, the only thing to really worry about is your villagers.
Since you have none of your dreamies, it's probably not too much of a concern if one moves out, I'd assume. But if you ARE worried about villagers moving out, every time you load your game from TTing, go around and talk to all of them to make sure they're not ignoring you or moving. You can also talk to like, say two villagers until they tell you to go away because they'll tell you if someone is thinking of moving.
I guess my post is biased, because I have and always will TT, but I also only do it within a few days increments. I don't think I've ever had any problems with TTing, I've always been careful with my villagers, especially now that I have all 10 dreamies. And as far as the island is concerned, yeah, go for it, TT to like 8pm and make some bells.
