Signing the buyers brokers agreement is only needed when you identify a property

They will have better recommendations for any title companies or lawyers there.

I'm a mortgage broker, so need a wholesale lender. 

I would use an experienced broker who can shop around and help you compare best terms on a National basis.

I’d simply ask in what situations where the broker and the brokers firm did nothing to facilitate the sale do you think you should get paid a commission?

You can always hire a different PM company.

I would say that it depends on the PM, I personally have a great connection with my local property manager in Memphis, TN and he manages over 700 doors and still answers my clients property management specific questions as the broker/owner.

I am a Broker Salesperson in the Jersey City/Hoboken area with over a decade of experience and have worked with many investors. 

There are some lenders that brokers can work with that also get down to Prime (7.5% as of today). 

Most will be licensed (as agents/brokers) in their states.