We have large starships that are horizontally long but what about the potential for a vertically long ship like the Y-8 mining vessel?

http://starwars.wikia.com/wiki/Y-8_mining_vessel
Standing at 140 meters tall, the ship was used mainly for mining but also by mercenaries as capital ships who modified them with laser cannons. The ship was equipped with heavy shielding to protect itself from meteorites and pirates.







