Quote: "Over the years we'll build up the island, doing most of the work ourselves. We'll build a communal building with a shower, kitchen, lounge, and bathrooms. Each owner of the island gets to pick a spot on which to build their own little structure to sleep in. Together we'll build infrastructure, gardens, a fire pit, and whatever else we can come up with." So, not counting significant others, ten people sharing…
I'm already over 30, as are many members of the group. I was extremely selective on who I invited, and they're all people I trust completely. There will be issues in the future, but we've come up with rules to deal with them. Also, as noted below, none of us are planning on living there full time-- just visiting over the summer, hopefully all at the same time.
Then I envy your youthful outlook. :)
By the time I was 30 I had had enough of communal living for several lifetimes.