no age restriction. I got one as moved here in my 40's and wasn't married so it was the best practical option. The price has more than doubled though now for them compared to what I paid 4.5 years ago
I moved here with a couple of suitcases only and sold everything else or gave away and frankly I didn't even need most of the stuff in my suitcases. I wanted to build our house with hempcrete also but couldn't find a supplier here at the time a couple of years ago so used AAC blocks instead and we've just built a farm complex for composts and worms and eggs etc. I wish you well and it's great to see younger people moving out here.