What kind of access do you have to your building site?
Can you get a pickup in there? Tractor with FEL? SxS?
10 years ago, I built a 7x8 in the swamp, on 8' legs. The door still opens and closes without binding.
The distance to the blind is 200 yards. I had to carry everything in by hand. Tools were either cordless or chansaw.
I used 4x4 legs. I made bases out of 15 inch car wheels with a short piece of 4x4 tube welded to the center to hold the leg.
I built the platform on the ground. With the help of my son, got it in the air and on the wheels. I then leveled it with a shovel. It's still level today.
The first 80 yards to the south of my blind is under water right now, flowing west to east.
Better access means better bases suchs as pads or poles.
I have posted pictures before, they can be found.
Let's See Those Hunting Shacks
For some ideas.