Do Yall think that a Uniden Home Patrol 2 would cover all the parameters ? By mid year I might be able to score one off of Ebay.
A Home Patrol-2 would cover the Plano/Collin County system whether it goes fully to Phase II, or only partly (such as Collin County fire departments going to P25 Phase I, while the current PAWM users, as well as other law enforcement on the Collin County side moving to Phase II).
The HP-2 would not cover any users on DMR. At present, the main user of DMR in your area that is possibly of interest would be CareFlite. Their helicopters, as well as ground units, are dispatched via Megahertz's DMR
trunked system.
Other P25 Phase II scanners that would work would include Uniden's BCD325P2 and BCD996P2. Those can get a paid upgrade to cover DMR if you decided that was needed.
There are also several scanners produced by GRE or Whistler that can handle Phase II as well as DMR. Of the current models, the WS1088 & WS1098 handle P25 Phase II, and have an available paid upgrade for DMR. Their immediate predecessors, the WS1080 and WS1095, also work, and have a DMR upgrade available.
Whistler also has a program for a paid upgrade for earlier models, that makes them Phase II compliant, as well as getting DMR. These include the PSR-800 (manufactured by GRE), and RadioShack models Pro-18 and Pro-668. See this thread for more details:
https://forums.radioreference.com/whistler-scanners/353415-new-legacy-scanner-upgrade-program.html
Edit to add: Current Whistler scanners TRX-1 & TRX-2 handle P25 Phase II, and have available free upgrades to add DMR and NXDN coverage.