@Ayman Bayoumy I recommend cozy as well and would like to point out that, although takes 5 days (unless pay for express payment), the system will email you with payment process details.

I would imagine that if the owner is receiving checks and doing Tenant screenings you could technically be like a "maintenance guy" or something.

Phone numbers emails for owner, as well as relatives and spouse/friends.

I imagine that the rental for a 2/1 single family is more than a 2/1 multifamily unit, but Rentometer doesn't take that into account.

Is there a web host or certain online service provider you would recommend for getting motivated sellers to enter their info so I can follow up with them as well as put them on email campaign?

I imagine that's a never-ending challenge.

Tell them your farm area and ask them to email you reports.

I filter everyone through email.

How do I get on listing-emails to hear about duplexes or triplexes before they hit the market? 

I have to find my own deals on realtor.com AND zillow email alerts based on a filter.My low ball offers are much more likely to be given a serious look because i developed a relationship with the listing agent, my best resource to take my offer to the seller and make the pitch.