Push biking from brisbane to nimbin?

Any one done it if so how long did it take i'ld be using a mountin bike. Or know any sites that I could get maps so I could plan my trip better because I'm not supper fit and the heat. I think it will take me all most 2 days there and back what do you think? I will be sleepong on the side of the road as I don't want to waste money staying at a plaxce that cost me money. Or any one feel like doing it with me?