The opportunity to help people who may need to sell their house is a worthy endeavor and the rewards are endless.

The list of potential benefits is endless. 

Unfortunately I do not have an endless stream of cash to continue to do that, so interested in other options :)My focus is buy and hold with properties that produce cash flow immediately, pretty standard, I think.

The resources are endless here, but at some point, the messier it gets, the less seasoned investors are going to spend the time.

Does anyone have a system they use to filter through the endless available markets and narrow down your options to something a bit more manageable?

You need a firm estimate for the remainder of the work as your funds are limited (like most people who don't have an endless amount of money). 

There really isn't any way around understanding RE, this really isn't a check list type business since there are endless variations, alternatives and concerns that are unique.

People who can see the endless cycle of homeowners wasting away under their debt because they don't understand how much they are paying to mortgage interest and promote the idea as an easy way to keep their extra income going toward getting them out of debt / saving money.

So in 5 years you have the money back and endless cash flow for the future.Your numbers fail to take in account several things.

That way, if I do not have a buyer at the contract price, I can come back in two weeks and say I have a buyer at $X, would they consider lowering their price.It helps that I do actually buy houses for cash and am able to say that, and add that not every house fits my profile, plus I don't have an endless bucket of free cash to buy every house.