I doubt there's anything available for less than a few thousand with a rangefinding feature built into a thermal scope, let alone with decent imaging quality at longer range. Perhaps in a few years, if progress with the tech continues at the present pace. For now, the Sector T20 -
https://sectoroptics.com/product/t20x-thermal-imager/ - is around $1,000. Mine works well enough for recognising humans versus dogs, for example, out to maybe 100 yards. For targeting I'd not want to depend on it further than that, and due to low pixel count, the reticle offers no real precision. Tried using it on rats with an airgun, but even at 5 yards I couldn't be absolutely sure of a clean head shot, as I can with an infrared scope to at least 25 yards on the same airgun.
These IRay thermals cost closer to double that, and imaging is surprisingly clear for hte price -
https://www.brandonoptics.com/IRay-...tifunctional-Thermal-Reflex-Sight_p_3527.html
A friend bought one of these. Enabling the reticle was a bit tricky, but he got it working. Hasn't shot with it yet, but even just as a viewer it seems an excellent option.
Sector has the G1T3, around three thousand, with a rangefinder and in-scope thermal view. Not fantastic resolution, but it seems a good system for combining optical and thermal viewing/aiming.
https://sectoroptics.com/product/g1t3-system/