I see what you're after with the Trellis now. Wierd LOL!!
I see the advantages for smaller orchards with dwarf trees though.
No need to leave room to get a tractor and spreader in there, and no dadgum ladders to fight on soft ground.
The elevated drip line caught my eye. No fighting the things when it's time to cultivate and the critters can't chew on it.
I like it. Makes for a nice garden.
The largest Berrys I have ever seen came off of Chandler bushes that had gotten frost damage, and lost about half thier blooms.
Quarter sized and larger was average that year. They are normally about the size of our Biggest Blue crop.
Flavor on Blue crop is "Classic Blueberry", with just a smidge more acid than Jerseys. If ya like them a little more tart than sweet, they are a good choice for production.
Here's another largish one. Blue Rays. I call 'em Pie berrys because they have that sweet but tart bite to them. I don't care for them much because they ripen up more for hand picking than machine harvest. You can hand pick on them from July through August though.
Pruning is done to remove the oldest canes(6-7 years), keep the middles open, shape the crown, and then to get the danglers out of the middles.
We Prune late, and after full dormancy as pruning early will cause early blooms and cause "frost panic disorder" as well as time things with the Union Bees contractual working conditions.
It also helps after stressfull seasons to get as much cane nutrient and hormone stored in the crown for next season.
Plain old Corona loppers and snipped as low to the crown as possible.
So you're potting and starting at the same time with the Rock wool.
Pots take up lots of space, so generally folks bed enmasse then transfer to pots once started.
Stay safe!
Dingeryote