Proudspire Manor (Solitude) Cost: 25,000 Gold. You can see the city from one side and access your balcony to leave the city on the other.
Other mods which may alter the landscape and/or navmeshes at the two affected houses will not be compatible Compatible with the Hearthfire version of Thirteen Oranges' Oakwood. These unnecessary modifications on navigation meshes have been created automatically by The Creation Kit (it's a bug).