Hillbilly? The only thing hillbilly about that effort is the hill. Looks pretty good.
I tried a lot of things to hold the aprons down, but the best of them was those 99 cent tent stake nails from
Walmart. They even have the plastic hold down head on them. If a person had rocky ground they could pound those in with a hammer.
As a reminder, the reason these aprons seem to work is when a digging predator goes at it to dig his way in, they start digging at the corner between the vertical upright of the coop and the horizontal surface that is the ground. They just follow the coop wall down the ground and that is where they start. Notice how I did the apron with the short vertical leg (about 4 to 6 inches) attached to the side of the skids. So if a predator started digging, he is going to encounter something he can't get through. So he may start casting up and down the line and try again and again, but always finds the same thing.......a wire apron he can't dig through. When Blooie said she overlapped the corners, that is the reason. If they make it to the corners, they will encounter the same thing all the way up and down the line, including the corners on hers. What he never figures out is he has to back up a couple feed, out past what he is standing on, to start his dig way out there and tunnel his way in.
The point to all that being the most critical part of that is to make sure he encounters wire or something he can't get through right at the corner between upright coop wall and flat ground. For you it looks like that will be a stone paver base. with maybe some bricks to retain the mulch beyond that and the first wire they would encounter is beyond that. I suspect a digger would start just outside the stone paver base, so whatever is under the mulch you are spreading is what the barrier will be. Also, with the apron laying on the ground, whatever you put down there will be subject to more corrosion problems than if it is upright. Chicken wire may not be as durable as welded wire, either in strength to repel boarders and may rust out sooner.
But that all assumes you ever get a digger in the first place. Mine has been up since last year and I've never seen any evidence that one has ever tried to dig his way under in all that time, even though I know they are out there all the time, including tonight (smells like a skunk may have found my electric fence and became incontinent.....the poor dear).