As to "morals", please don't feed me that)))) There is nothing moral or ethical about doing business, it's just a fact.

then MLS feeds to all the SM sites and agents can filter through the responses or if it my own property like here in Oregon with our subdivisions I handle the first calls and then qualify them once done and appointment set hand it off to the closer ( my wife )  If I get a ton of E mail request for info I just tell them they need to come and look first.

Are there other good channels to find qualified tenants?

But I'm curious why you feel SEO isn't a good marketing channel to invest in?

They literally spoon feed you all you need to know and all you have to do is figure out a way how to implement it.

Over the past three years, I’ve been using most of the major off-market techniques.One standout method has always been pulling data and feeding it into a call center to generate off-market leads.

Over the past three years, I've been using most of the major off-market techniques.A classic method is pulling data and feeding it into a call center to generate off-market leads.

Let's say each does only a 20% markup, let's start with $100.00 Manufacturer need's $100, so sales agency sells at $120, wholesaler sells at $144, supplier sells at $172.80, distributor sells at $207.36 and your big-box store sells to you at $248.83Which saves more $, trying to pay at box-store or getting with someone higher up the feeding chain? 

Kill 2 birds with 1 check, reinvigorating areas and creating the growth and expansion that feeds not only housing needs but with all the ancillary things one needs to have along with a roof over the head. 

Batchleads' response was to suggest lying about the industry to get the campaign accepted, which we obviously did not do and strongly advise against if you wish to avoid getting sued.My current marketing channels are outsourced cold calling and PPC.