I would recommend Dominic Fonte as the realtor in the area that fits what you describe. 

One great way to find investors in the area is look for absentee owners in the neighborhood/couple blocks surrounding your fourplex and send them the deal through DM even if you have to!

This doesn't even address how people are going to fit two dumpsters on a city lot.

Love the idea of pursuing your home inspectors license - that will give you a unique perspective on your REI career.I'm not super familiar with the south TX area, but it sounds like you've given a lot of thought to your strategy and the neighborhoods where you want to execute.

I've been finding vacant homes either through probate notices or driving through neighborhoods.

I've done the same for recently sold similar condition and configured properties to get idea of cash on cash returns in neighborhoods I'm interested in.Mostly between $200-400K.

The big advantage to the design is a relatively small foot print (3740sq ft) and a fit in anywhere elevation (appearance). 

Below is what I've gathered from my research thus far:Before reaching out to professionals in my area, I want to ensure that I am the best person to fit their needs.

Also, make sure this conforms to the neighborhood, in some cases losing a garage and gaining livable space can cost value.As always, seek professional advice.

Very specific situation I've got here that I haven't been able to find good information online that fits this unique criteria.I have a friend that has a property that they own free and clear of mortgage, yet they are paying a HELOC of approx. $300 a month for.