New guy here. There is a ton of good information in this original post and follow-up discussion. I have not read the entire thread yet but I plan to.
An observation: the original posts asks the most important question "why do you want to set up a repeater?" and then answers a completely different question: "why you don't want to set up a repeater"
It would have helped the discussion to actually discuss the original question, and then follow with separate threads/discussions about each of the motivations/use cases. For example, the OP initiates a great discussion on one use case (permanent public repeaters), but dismisses other uses cases (portable repeaters for events; personal repeaters for hunting areas, farms and ranches, local groups).
Clearly, there are people who have had success with each of these use cases. A good thread on each would be valuable in a diverse forum like this.