From the standpoint of your original question - no, you don't "quarantine" the initial set-up of a bare tank. Typically, the reason you hear the adage to "quarantine everything wet" is to prevent the introduction of fish or coral diseases into an established tank.
In this case, you're establishing the tank, so in effect your tank is the quarantine. Simply set up everything the way you wish, and let it settle for a few weeks without adding fish or corals. At that point (and after you remove a few undesirable hitchhikers, like gorilla crabs), you can start adding animals that you've quarantined (fish and corals). With a tank the size of yours, don't skip quarantining your fish purchases for at least 4 weeks.
It's one thing to tear down a 30 gallon tank to catch all of the fish and put them in a hospital tank for treatment (though still not fun!), but it's quite another to do the same to a 190 gallon tank.