More for your consideration:The following are links to information that the savvy investor would need to combine investment tactics and techniques to generate high yielding ROI.

Are there certain property management techniques or companies to go with that deal strictly or a large portion of their business towards S8? 

Less is more with this kind of tenant so limit communication, use the broken record technique when you talk to her (repeat yourself) and acknowledge what she says.  

I've been at this for a while and I can sell most of my properties using simple techniques that don't include real estate agents.

If someone says it is an "assignment" contract, they have to disclose their fee.Let's just think about that for a second.If he is getting paid by the seller directly, fine, no problem.If he wants to double close, fine, no problem.If he says assignment, then what is the fee to buy the cotract, if I move forward.There is no other way to cut it unless there is a new technique I don't know about.If I negotiate on the entire price, it will affect his fee regardless, unless he is earning a percentage from the seller.Let me pose this to everyone who has responded which I find odd.

I've only been looking online with Zillow, and am wondering what other websites, tips, or techniques people have or use when searching for properties to ensure they are finding everything that's out there, or hearing about new properties that come on the market quickly. 

There's a special technique he had to use. 

I've learned and applied a TON of the techniques from there. 

I used that argument with a lot of techniques from “never split the difference” by Chriss Voss to convince (now she thinks it’s her idea) my girl to purse house hacking with me.

Ah yes, the 'ol Frog in the Pot technique.