Ranik Keeran
Forgotten Assassin
If it won't qualify in size terms as a personally owned vessel, it's fine. It was mostly going to be used as a home either way. Ranik wouldn't have an entire crew, it would be idling in space most likely. I just need to know if anyone would think this fits the bill for 400m or less.
http://starwars.wikia.com/wiki/ShaShore-class_frigate
http://starwars.wikia.com/wiki/ShaShore-class_frigate