Is this enough compressor?
a LOT of crappy compressor makers rate their compressors at ZERO PSI to make their CFM ratings seem large. .
READ the above AGAIN. THIS is the big problem with ratings. Some are rated at SCFM ---INTAKE air, NOT the high pressure output, and some are rated at 40 PSI, NOT at 90 PSI which is what your air tools are rated at.
Also, don't get too excited about gallon capacity of the tank. IF THE PUMP cannot keep up with the flow, then the TANK SIZE is only going to give you a few seconds/ minutes of reserve before the pump cannot keep up.
Don't get too excited about HP ratings. HP used to be a very "honorable" rating, but no more.
Make sure the CFM rating at 90 psi gives you PLENTY of reserve, but a BELT DRIVE system, NOT direct drive and STAY AWAY from these ridiculous high-RPM oil-less compressors.
Plumbing the shop and air dryers is a whole other ballgame