He said many times they are not ready to sell but by developing a relationship with the owner, when he/she was ready to sell he had a foot in the door.If you're in this for the long term you might want to start reaching out to property owners.

There are no shortcuts for building relationships with other investors.

The best profitable relationships are going to be built in social meeting sessions where you may not get to talk to everyone but where you can make an impression on some people.

Sometimes if you have a relationship with a laywer (which you should in this sort of business) they're provide you a consult for free. 

That way, when you have a couple deals under your belt, you will be able to really start growing the relationship to other buyers. 

Lastly is relationship.

Looking forward to meeting professionals in the industry whom I can learn from and build great professional working relationships with.

If you want to preserve the relationship, don't buy the property unless you are prepared to stick with status quo....with a smile on your face the whole time.

I think that it's much more beneficial to have a solid relationship with a good local banker.

I would find a TRUELY investor Friendly Agent, that understand what working with investor is like.Build a relationship.