You might want to temper your expectations a bit. GLWTS
quick search:
https://www.adorama.com/used-dji-zenmuse-h20t-sp-gimbal-with-thermal-camera/p/vdcdjicpzm12?grade=excellent&utm_content=pmax&gclsrc=aw.ds
This sounds interesting, but $6K for the drone, $5K for one camera, $7-29K for the 360 camera, $100 for the frequency meter and $60 for the Osha Certification is quite a buy-in...without any info about the payback. It wouldn't hurt to add a...
You didn't mention reliable transportation, fuel and upkeep for a lot of travel, insurance, sleeping and eating accommodation, willingness and ability to be away from home for stretches of time, etc.
While this can be an opportunity for the...