Instead of you being stubborn about wholesalers and cash buyers, why don't you find a way to help them and work with them to ultimately help sellers out? 

Long story short my very stubborn dad has finally agreed to let me sell his SFH.

Sure be stubborn, keep thinking that this monkey dude loves to show off his leads coming in... or .. just see the logic in this and think on your own and step up!

And no mailer and no landing page can give you as much credibility as a full blown website can.And I am not just blowing hot air...This goes on every day every month every year, without pause without interruption without any money spent.I just don;t understand how much convincing investors need to open their eyes and realize what the hell are they doing.Investors are among the MOST stubborn and egotistic people i have ever seen.

I agree with @Jonathan GreeneSure there are motivated people on there... somewhere.... but there are way more stubborn people that think they know better, thinking their house is worth $55K more because their dog was born in their living room.

I was very stubborn but in this sense it helped me.

I suppose I could run a fence between the properties but cats can be very stubborn and they will, of course, find a way to get around it.  

Some of the best deals are from stubborn old farts you think they are winning by sticking to their guns.

I've been told that he's very stubborn about letting anyone into the unit, and mostly keeps to himself.

Too bad that tenants are usually too stubborn to do the smart thing.Take your landlord to court, you may get something you may not, either way all the dirty laundry is coming out.