Mr Ruf said the caravan was taken between 10pm, when his flatmate parked behind it, and 6.30am when he woke the next day.
He said the theft appeared to have been well planned, as he and his flatmate always parked it in between their cars to help keep it secure.
"They would have had to cut the lock and had a key to wind up the legs that are used to keep it stable."
Mr Ruf spent nearly $4000 on the caravan, not including the months of his labour. He had only managed to spend one two-week trip away in the caravan so far but it had become a much cherished project.
"You take something really dilapidated and put so much love and effort into it, you do it for a long time, then someone steals it?
"I want it back. I'm happy to give someone $1000." Kiri Gillespie