But my next question is, when building business credit for an llc or s corp. will the place I get a business card take into account all of the shareholders personal credit or the business itself? 

Hiding behind contractual technicalities and perverting the law for self benefit never wins.

Even if you are not there you tenants should be able to ask for his card. 

It’s a win-win.

I don't think she can win any case against you just for trying to collect rent.

This means on average the winning bid was 3% more than list price & spending time w/ low ball offers would be a waste of time.  

They tried to get me to pay more to access services I had already been promised, and also put me on auto-pay with no way out until my credit card expired.  

I'd think though that the trespass signs send exactly the opposite message and you really want to win the battle in their minds as to why exactly you're in town.

In the wake of the bailouts and foreclosure scandals, robo-signings, etc why do we use these guys for our credit cards or banking needs at all?  

If the words "credit card limits" and "increase" are in the same sentence at your seminar...