I've been wanting one of these since forever. The fairies don't seem to want to build me one so I'm gonna have to build it me-self.
Progress is as funds and health permit. There won't be a central pier, I'll be imaging primarily on the floor boards. Been doing it for 30 years in the house, not going to change now.
Used 4x4 H4 posts for the corners and central area, 200x50mm for the outside skirting and 150x50mm for the floor joists. The floor is 18mm marine ply. Already had a night out on the floor and results were good with no vibration from traffic. Three walls are now in place along with a door. I used 17mm ply for the walls since the ply was 30% off.
Now I guess I need a roof.