Two weeks later I stopped by the unit (was passing by and decided to take a look) and found that someone was using the shower and leaving food and clothes in the house with visible intent to return.

If your intent is to scale, I agree with many of the others that have mentioned how cumbersome that would be dealing with so many different cards and properties.

Try looking into zillow/Redfin and see what your potential rents you can get near the neighborhood by filtering the bedrooms/bathrooms of the intentional property that you are planning to buy.

Business Journal (BizJournals) is the main one I read, but you can find others. bizjournals post about the new developments and changes in the city.

I didn’t know about the chip plant, I will look in to that.are those places close enough to Dallas to be affected by the city and its real estate or is it mainly because of the job growth in the area? 

the success or failure of every single step of every single project is on you.I've mainly been targeting off market properties through wholesalers.

The main reason I'm asking this, is to understand how much cash I need to save up in reserves before pulling the trigger on a deal like this?

One of the main benefits of participating in the Section 8 program is knowing that the rent will be paid each month (or at least the Housing Authority portion of it) - Now that's gone. 

The intention of the post is that management can help individuals create income and have a better understanding/control of their investments. 

Since you're an individual, mainly whether or not the 4plex was built in the last 15 years.Assuming the tenants have occupied their units for over a year you'll want to give a 60 day notice.Alternative route?