Don’t be afraid to look at used units. Lots of guys buying high end and finding out after a year it isn’t what they thought and trying to recoup some of their money.
Agreed, you might check out facebook marketplace I got my AGm from there and it looked new in box for about 2/3 new and any I have would do you just fine (my opinion) if your reading descriptions don’t pay any attention to the so called detection range they might be able to detect something at that range under ideal conditions but it will be just a heat blob at best
Most of the lower end units like mine should do you just fine for what your looking to use it for, the Oneleaf I have will easily detect and show a canine out to about 500 yards but at the distance you will see a canine shaped form but not be able to tell if it’s a dog/coyote or fox and won’t till about 300 or so, the GoYoJo I have is perhaps a bit clearer but it’s relatively new to me so I can’t really tell you how it will do beyond a couple hundred yards as I haven’t had it out except to do so testing around the place with it
I would say any of the ones I have would do you just fine even the AGM I have which is probably the cheapest, the one I have I think runs under a 1000 new and probably about 2/3s that off Amazon, if I was going to pick one though I would pick the GoYoJo and the only reason would be its scope shaped IE like an actual rifle scope and is a bit easier to setup and use, again my opinion
Good luck, I have to warn you it can be addictive