Contacting Banks

Hey, I’m looking to try my hand in the Commercial/Industrial side of the RE coin, Sites like Loopnet are far from awe-inspiring, I hear that contacting banks regarding commercial and industrial properties that they may have, doesn’t differ too much from contacting them about foreclosed residential properties that they have, is this true? Is the negotiation process similar overall? Are the forms different for tying up commercial property or should I just use a PA and allow myself 60days or so to evaluate the deal and develop my exit, is it true w all bank owned properties that at the first sign of a weasel clause that theyll kill the deal? How should I go about getting out of a property? Should I use a double closing or what?

Sorry, thats quite a few questions

Thanks in advance,