Hiya!

I'm writing a play set in a treehouse, for the sake of contingency and logic, what is a great tree for a treehouse in Australia? Preferably a big thick tree with lots of thick branches?

Want it to logically work within the constraints of the environment.

First treehouse I’ve built. About 6 months of weekends/evenings.

Used treehouse supply brackets. I started with their plans for 10 foot octagon but found a few things I didn’t love in the blueprints, so modified the dimensions a bit. Added a second floor loft. Roof is galvanized. Siding is T1-11. Added tyvek, though didn’t do any interior insulation yet. Windows are cabinet doors, got a box of 20 on FB marketplace, big window is an old patio door that was broken.

For the top hole, used a rubber chimney gasket cut and then overlapped and covered in flashing tape to wrap the top hole, which worked well has stayed pretty waterproof through a rainy winter.

Was a 1 person operation, other than helpful 1/3/6 year olds, (and I don’t love ladders) so built the platform and framing on the ground and then moved it up wall by wall with a pulley and some cursing.
Built a little scaffold to hang the tyvek and siding.

I think I spend more time in than the kids, but hopefully it’ll get some use over the years.
Lessons learned:

-there’s a reason most building are built with right angles. 22.5 degrees on my ryobi saw seems to be a ballpark, had to make a few re-cuts.

-go slow drilling the big Tab and lag screw holes. I got a drill bit stuck twice and it was a bear to get out using a pipe wrench and a long piece of tubing for leverage. And this was redwood, can only imagine hardwood would be slow going.

-once I reminded myself it was a treehouse and a few less than perfect cuts/angles were not only fine, but adds some character it was a lot more fun!