Welcome Chris.
A mobile hunting shed would be nice, something I have been considering too. If I ever do build one, it will be a bit longer as to accommodate a bunk. It would need to be insulated and heated for comfort. That way a guy can stay out all night without suffering. Man, I suffered that first winter, even with my cabin before I insulated it. After the insulation and heat, it's very comfortable. I have thought of perhaps building a shed onto a small trailer, or even trying to find a small camper trailer that already has everything I need, except a shooting window setup.
Here's an idea I found a couple of years ago. A guy had this one built so he could sell Ice cream, slushies and such at various events. But, this could be used as a neat mobile hunting shed.
A guy could use some stabilization jacks at the corners and turn this into a neat little hunting shed.
