Isn't it a bit silly to have a quest that requires you to purchase a particular house (i.e. one you can plant trees in)? That quest is going to be sitting in my log for a very long time. =p
It's an old old quest from the days that every house had patches and you could plant beans in any region. Pretty sure it will get seriously tweaked or removed.
in a game you'd play for years, there's a good chance you'll move at some point. for that and many reasons I think it's perfectly ok to have a quest that you can't complete in your current situation. I'd rather see an identical flower quest added so you can do one or the other "now" and do the other one "later".