A simple-to-build AllStar node and affordable at $255 out of pocket
Cooling fan is on the way from Ham Radio Outlet. I replaced the antenna on the TYT radio with a 50-watt dummy load. I updated the information about the wiring between the radio and the DB9 adapter, and the part number for the wire jumper is shown in a screenshot of part of my Digikey order. And I added a few more photos of the rear of the package.
One day later...
 The radio gets pretty warm. I'll add a cooling fan to the system to control the temperature.
 Audio reports from other AllStar users tell me the audio quality is high but my internet connection is less good. Some packet loss is affecting my transmissions. Nothing I can do about that. I've updated all of my network hardware (including the cable modem) so this particular issue is outside my control, other than to consider a different provider.