For this size cabin, if you are sure about the location, the concrete piers would work as suggested. If you are not sure about location and will have a tractor, you could build it on skids.
You can ask the internet what the frost depth is in your area and dig your piers in to that depth. If it were me, I would have the lower joist system at least 18" from the ground to the lowest part of the joist system.
You could use sonotubes and have them extend out of the ground to that elevation and set your floor system on top. No matter what you decide, I would make sure there is a transition from the piers to the floor system that can be accessed/unbolted/unfastened.
The reason I mention the transition and the 18" is because if there ever is an issue, you can get under the house, with a small bottle jack, and relevel the house.
If you decide to not leave the space under the floor system, you can use a hi-lift jack from the outside to accomplish the same thing. I have used both methods to relevel conventional houses.
Both methods are very easy to do. Knowing you can fix any potential issues that happen over time will give you some peace of mind. This way, you don't need to feel the need to come up with a "perfect" solution.
Perfect is the enemy of good enough. Meaning that the endless pursuit of flawlessness can often hold us up from taking action.