Depending on your climate, pulling outside air in is likely to cause heat to escape during cold weather, and AC air inside to leave when hot. Also, unless the shop is huge, placing all this in the middle means it will be in the way of practically everything. Consider moving the DC system to one side. I recall seeing a huge, shop built double filter column with a shop made box on top and bottom. The top to feed air into the double filter, the bottom to catch the sawdust. Have a cyclone system in front of that as a chip collector, and then the blower. This setup allows you to keep the cool/warm air inside the shop with the least possible heat or AC loss.
If I were doing this, I'd use metal or pvc pipe running across the ceiling to each of the tools, with blast gates at every tool so you can close off tools not in use.
Hang 2-3 WEN air filters so they create a flow of air. An hour or two will clear pretty much everything. I would also make certain you had DC atop the table saw as well as below. Every tool should have DC on the top surface.
For chop saws, consider hanging a shower curtain around it, gathered at the bottom into a DC port.
Use as few, short flexible hoses as you can.
Since you're building new, invest in an industrial, 220v DC unit. I like the Laguna commercial cyclone shop units, but there are many other good cyclone machines.
And, I'd still wear a positive ventilation dust mask and have a couple of spares for anyone else coming into the shop.
You might also consider adding a really strong vacuum port into which you can plug a long hose. No matter how carefully you do collection, some sawdust will wind up spraying around.
Put doors and drawers on all stands and storage to help keep sawdust out. Put as many items as possible on casters so you can pull them out of the way when you vacuum the floor. The worst thing you can use are open shelves. The sawdust will get in there and you'll never get it completely sawdust free.
Build a finishing area as far as possible from the cutting areas, or hang clear plastic sheeting over the opening to that area to block sawdust intrusion.
If you build on a concrete slab, have it sealed and finished, preferably in a light color or even white. Much easier to keep it clean. Get an oiled dust push broom and run it over the floor from time to time.
I'm assuming that your budget is sufficient to cover new construction. If I were doing this, I'd construct the walls using 2x6 studs and put in R38 insulation in the walls along with radiant bubble style wrap. At least the same insulation in the ceiling. I'd drywall everything.
I'd run 220 and lots of 110v plugs all over the place. I'd color code plugs on each circuit so I could avoid too much load on any one circuit. Separate circuits for the AC, heat and lighting--which would be warm LEDs. I'd use recessed lighting fixtures to help seal the dust out and keep it from accumulating on fixtures.
I'd put a bathroom in there too, depending on the local construction regs.
Always fun contemplating how you'd spend someone else's money on a shop.
The more I do, the less I accomplish.