How does life in the big city rent-free sound to you?

Too good to be true, sure.

But not if you're living in the back of your truck.

Chrissie Junge has turned the idea of home ownership on its head, instead choosing to live all over Brisbane in the back of her 2000 Mazda T600 truck.

Nicknamed Harry, after the man she bought the truck from, Ms Junge's goal while maintaining her job as a retail manager is to convert the $13,000 vehicle into a fully-functioning mobile home, complete with toilet, shower, and small kitchen.

"Then I'm going to quit my job and go around Australia. I'm going to take as much time as I want," Ms Junge said.

"I'm going to find random, crappy bartending and fruit-picking jobs all over, meet lots of people, see lots of things, and have fun."

She's been documenting her journey so far on Instagram and with a blog.

"People keep thinking I do it for cheap rent and stuff, but I just wanted to be able to go wherever, whenever, and wake up somewhere beautiful and different every day," Ms Junge said.

At the moment there's not too much to the truck — there's a double bed, a couple of windows, and a small fridge powered by a sometimes unreliable battery.

Until she has a toilet and shower installed, Ms Junge uses her membership at a large gym chain to use their bathroom facilities wherever she is.

'I'll be saving a lot of money once it's finished'

After work each day, Ms Junge parks her truck in one of a handful of locations around Brisbane.

"I usually live in all the different corners of Brisbane, I'll park where there's water and there's trees," she said.

"I probably have about four favourite spots and then a whole bunch of other spots I'll just randomly go to. Places that are closer to work I'll stay if I'm starting early the next day. I just kind of tailor it to suit where I'm going to be."

Ms Junge takes in the view by the water from her truck/mobile home. ( Supplied: brisbanegirlinavan )

She's wary of rules around parking, and has paid the price previously for it.

"Sometimes I'll park where the bigger trucks can park … or there's quite a few camping grounds around where you can stay overnight."

Ms Junge said the truck would be a money saver — once it's fully operational.

"I got a big loan to get a new truck. Once I finish paying off the loan and once I've finished building it, I'll be saving a lot of money," she said.

She's the first to admit that the lifestyle isn't suited to everyone.

"You've got to be a certain person for sure," she said.

Ms Junge has been living in the truck since buying it in May 2017. ( Supplied: brisbanegirlinavan )

"Some people love to have heaps of space. I find if I have a smaller space it kicks me out into the outside world. Otherwise you might just sit in the living room and watch TV all day.

"You need a bit of guts too. You're parked somewhere and people could be going past at night.

"It's a little bit scary at times but it's absolutely worth it.

'Sometimes I do feel a bit lost'

Living in the back of a truck isn't exactly conventional, and it does raise a few eyebrows.

A room with a view, depending where you park it. ( Instagram: brisbanegirlinavan )

"I get mixed reactions from people," Ms Junge said.

"Some people think it's cool, and how they wish they could do it, or tell me how they did it when they were young or want to do it when they retire.

"Others ask if it's hard, where I shower, or if I can afford a house."

There are some things she misses about a typical bricks and mortar home.

"I've had a couple of nights where I've finished work and I've just been absolutely exhausted and my brain is fried, I'll go to drive home and suddenly realise I have no where to drive to," she said.

"On those nights I've got places close to work. Sometimes I do feel a bit lost because I haven't planned where I'll go that night."

She has good friends she can count on who help out in a number of ways.

"They say I can stay with them whenever, or if I need to do washing I can just come on over."