We were in the same position as you regarding a potential home purchase with Dryvit. After some investigation, we decided against the purchase. You NEED to find a home inspector that is familiar with Dryvit.
I used to write Personal Insurance (about 8 years ago) and insurance companies were either not writing home insurance policies with Dryvit homes OR they were extremely expensive. My investigation found that Dryvit captures moisture on the interior and the mold/rot is undetectable from the outside - until it's too late and very very expensive to repair. It's not only in the South as the agency I worked for was dealing with two claims when I left.
Like I said, we walked away from a beautiful house at a very reasonable price. And, that same house has had at least 3 contracts on it and they all fall through.
Good luck!