As I noted earlier (
post 7), from your location in Gillespie County, there is a fair chance that you can monitor the
system using a 436HP. You may be far enough away that simulcast problems will not be an issue. Of course, if you have your scanner (436HP) with you, and drive into Bexar County, no it's not likely to work very well. But from a distance (you're in the 'second county away' from Bexar County), you might be able to use the 436 instead of upgrading to an SDS series model scanner.
If you want to give the 436HP a shot, buy from a retailer that does not whack you with a large restock fee if you need to return it. ScannerMaster is usually fairly straight forward, but you would pay freight both ways (shipping to you, then shipping for a return). ScannerMaster is currently at $$505.00. Bearcat Warehouse currently shows $443, but I'm not familiar with their return policy; their webpage indicates that return shipping is not paid (unless returning a defective scanner for exchange in the first 30 days after purchase), and if you purchased with a promotional 'free shipping', that 'free shipping' would be charged back to you (except, again, for a defective unit within 30 days of purchase sent back for exchange).
Amazon is currently at
$445.00 (ironically, that's from Police Scanner Outlet, which is the name Bearcat Warehouse uses for their Amazon Marketplace items. Amazon shipping to you is free (at the price of this scanner), and if you are an Amazon Prime member, return shipping is also free.. You would pay the Texas sales tax if purchased from Amazon; I don't know if that would be collected if ordered from ScannerMaster or Bearcat Warehouse.
Regardless of which scanner you end up buying, no matter from which specific dealer,
do not pay for the dealer to program it for you. That costs you $60 or more, and escalates with each additional county selected. There are far too many threads here on RadioReference, Wiki pages, and YouTube videos to walk you through programming with additional charges. There's also a number of members here that can create a starter file for you to use, as long as you install Sentinel (or other software, such as
ProScan). Sentinel needs to be installed, regardless of any other programming software you acquire, since you need Sentinel to maintain the database for the scanner, and also to install any firmware updates that may finally be released. (I'm not holding my breath on that, though the Uniden rep, Joe Bearcat, has implied that at least some updates are in the works within the next year, though he did not provide any specific models to get the update.)