Is there some sort of industry standard for getting rough rental estimates? 

You wont know until you create some spreadsheets, using the criteria and analysis that is used in the RE industry.   

I'm aware there is a lot to learn in this industry but feel that it will defiantly be worth it in the long run. 

At some point a bank will get on board, but the industry is so new and volatile that I don't expect it any time soon.

Hutto particularly is well located to all the industrial growth around it (Georgetown, RR, PF access to 130 (to Manor and Giga) and now Taylor).

This is a very small industry and most sellers don’t waste their time with newer investors.One reason why is we call them tire kickers.

While many agents can get you a quote, many may also be unfamiliar with the nuances of the industry. 

Then there's the transactional (deal-making) and litigation (deal-breaking) dichotomy within each area.There are some basic vetting that apply to all industries and some thoughts that are applicable to only lawyers.  

You can't even tell what industry they are truly devoted to.Not to mention, their qualifications are laughable.

Looking for stable or growing population, varied work industry (not just one main industry), B/C class areas, 1% rule (min 6% cap rate).