I've been running around the towns to find a nice place to have a home, but I have a few questions before I would join.

The most important to me is that am I able to buy two plots to have a large house, and if so which towns have two plots side by side available?

As far as basements go, I can understand they can only be as wide as my plot size, but how deep can they be before they are considered too deep? I don't plan on making a huge basement, but its better to be safe than sorry.

I've seen at least one town have a rule on house height, but I don't see many rules on it in other towns, so is it safe to say its ok to have a house with lets say 4 levels, and possible a roof farm?

That's all of my questions for now. So based on my concerns, where is the best place to live? 

there is also a mining guild in our town which you can join and i am in charge of that
danniel1998 is in charge of the farming