I have a 60 Gallon 5hp Quincy compressor in the corner of my shop. it keeps 150psi at all times. I like volume, so I took my old compressor and put it over by the shop door (opposite side of the shop). I plumbed it in with a check valve and it is regulated to 90psi.
For general tool work, I have the 90psi tank to work off, for blow gun or impact gun usage, I have the 150psi main source.
The 90psi section has 100ft of hose attached to the inlet which is all coiled on the wall. This small regulated tank is small and on wheels. I can roll it all the way to the house, which is handy for indoor usage of brad nailers, etc, without owning another compressor.
Bonus part of the second tank, it acts as a large secondary water drain. I get no moisture whatsoever coming out of that tank.