I can't think of the actual names of it now, but the premixed bags of cement, sand and gravel. You just add water. You could even mix it in a bucket if necessary. A wheelbarrow would be better.
I would dig holes with a post hole digger and pour individual footings. I would then rest the floor's framework on these footings.
I would build it with a wooden floor and try to INSULATE it. Of course, if you were in a good rocky area, you could do a natural rock floor, LOL!
I've tried building free standing cabins two times before. We didn't use footings, just brought in concrete blocks and/or AC pads. We set the frame work on these and it worked fine. But we picked our locations very well (lucky). Both were rectangular prisms, I like the looks of this triangular prism cabin much better. It isn't as roomy, but you would have less materials and cost. Also, I believe it would be easier for one person to build if alone.
