Next bad news is there is only 12 1/2 acres there, versus the 25 we bought.The surveyor the day before had gone to the land registry to get a map.Contacted the Buyer agent we use, and asked to make sure his group did the title search as noted before. 

You will get much further in your search by signing with somebody experienced in the space.

I would then start the search from there. 

I am not seeking to charge each tenant, only seeking to remotely monitor each buildings water usage to identify costly waste/problems early as possible.

You're searching in the right area, here in the southern/middle part the laws are much friendly as well as the prices.

The contract must contain:the contractor’s name, address and telephone numberthe approximate start and completion date, including any contingencies that would change the completion datea description of the work to be performed and the materials to be provided to the consumer, including make; model number or any other identifying information; and the agreed-upon price for the work and materialsa notice advising you that you have three business days to cancel the contract, unless during an emergency you waive the right in writinga notice that all payments received by the contractor prior to completion of the contract work must be deposited in an escrow account

I’ve used public records in Texas to identify estates in transition.

Just search the Bookstore here on BP and you'll find many.

Your ranking in your area for the time guest search is everything for this business.

1) Research Zoning of similar property2) Do search with same zoning criteria with propertyradar or have title company give you a list.3) Possibly filter by satellite photos to eliminate undesirable topography.