Quote from @Christopher Sandys: Hi @Bill F., I particularly like your point #3.   

If you want to make the best wine possible, the vineyard soil and weather patterns specific to your site are the most important.

I would just order as needed.Here in socal, I have tall fescue grass, and I like to grow it long during the hot summer to keep the soil moisture and shade, and to help prevent weed overgrowth.

I learned a lot about soil studies and how to underwrite deals that may have issues with oil spills (EPA concerns).

Our "line in the sand" is that we have to expect to NET $50,000 for it to be worth our time.  

They looked for bare dirt on the outside within 5 feet of the house and we had to mulch any exposed area( or have grass).Floors are a big area for tracking dirt in and a painted house of this age has lead in the soil so one of our floor samples did cause us to fail the first inspection (just over the limit) so get a good cleaner in before the inspection particularly if there has been work recently done.

The TX soil/clay will continue to work and shift.

Best of luck Sandy Glover

They wear the same 5-8 shirts and they are slightly soiled dirty.

It's unlikely an inside issue damaged the foundation the way you described it - look outside: downspouts, wells, soil.