As used in this chapter, unless the context otherwise requires:(1) “Real estate broker” or “broker” means (A) any person, partnership, association, limited liability company or corporation which acts for another person or entity and for a fee, commission or other valuable consideration, lists for sale, sells, exchanges, buys or rents, or offers or attempts to negotiate a sale, exchange, purchase or rental of, an estate or interest in real estate, or a resale of a mobile manufactured home, as defined in subdivision (1) of section 21-64, or collects or offers or attempts to collect rent for the use of real estate, and (B) any person, partnership, association, limited liability company or corporation employed by or on behalf of the owner or owners of lots or other parcels of real estate, at a stated salary, upon commission, upon a salary and commission basis or otherwise to sell such real estate, or any parts thereof, in lots or other parcels, and who sells or exchanges, or offers, attempts or agrees to negotiate the sale or exchange of, any such lot or parcel of real estate;

Some exterior walls were 2x3 stud construction and and 2x2 was not uncommon with many manufacturers for interior walls. 

Does anybody know any reputable contractors in San Antonio?

This particular article had written requests from 18 state associations to reprint in their own newsletters at the time it appeared, so they must have felt it had value for their members.It is too bad you were not at the recent Annual Meeting in Virginia Beach of the Virginia Manufactured and Modular Housing Association where I was the featured speaker.

if so, how does one find one who is reputable?

As long as the GC is responsible for everything and reputable, according to your post above, you have a fair point.  

We can refer you to reputable contractors of all sorts that we've worked with. 

Charlotte is one of the best areas in the US to buy rental real estate and it has been so that I know of personally since 1993.Top areas have been since 2002:Phoenix (now pricey), Dallas Ft Worth, Austin, Vegas,Charlotte.Charlotte is not a tourist economy like Las Vegas, CLT has a solid finance, manufacturing and tech base for employment. 

I don’t really want to get a property management company to manage my doors, the company here doesn’t have the greatest reputation.

What sets one apart is reputation and being one of the top people in the industry.