On your last idea, I've heard magport connections would help make that a breeze. A little pricey though!Opinions based on experience:
This last idea I saw and think it's genius. If your shop space is going to force you to put machinery on wheels and push it up against the wall until you need it, then pull it out so you have room to work, reconfigure your dust collection system. Instead of running pipes and drop pipes and gates all around the walls, which BTW will require a much larger HP collector, install one 2-3 HP collector in the center of your floor space. Attach a splitter and hook up one hose directly to your table saw, which will be close by. The other hose is a long 4" flex hose with a handle that will reach every corner of your shop. When you pull out a machine from the wall to use it, just attach the hose. This is amazingly convenient and much cheaper than running duct work all over the shop.
- Since you're building new, get high ceilings; 9' minimum, preferably 10'
- Install excessively bright LED light fixtures.
- Centrally located in the ceiling install 2 50' or longer retractable extension cords with triple head. Make one of them 20 amp, circuit breaker to tool plug-in. Smartest move I made in my shop.
- Install a sanding table with high-powered vacuum system. It's amazing how fine sanding dust can coat every surface in your shop, even with ceiling mounted air filter. Trap the dust at its source.
Last thought: It only costs 85% more to go first class. If you want it, buy it. You'll be glad you did one year after you have been using your shop.
You can do that on this too.In my shop building talk I address the tool layout idea. I find the best idea is to draw the floor plan (big 1/2 in. to the ft.) cut your machines out (remembering to leave room for you) and move them around. This will give you the freedom to try lots of different ideas without moving cast iron.