I think a 10" prop will be far too large for those motors and you should be looking at no more than 8". For maximum range you may even want to go a little smaller to reduce the power.
You could use one of the many on-line motor calculators. For example this one suggests that a 10x5 would run at 19amps, while a 8x4 would use 13amps. To get down to 6amps, you'd need a 6x4.
If you want to use big props, you can run the numbers again for a lower Kv motor.
However what you don't know is how much power you need to fly, or the optimum speed to fly at. As you go faster, you need more power but you also cover more distance. Too fast and you're wasting power fighting air resistance, too slow and you're using most of your power just to stay in the air. You need a fixed amount of power to counter your weight, and the rest to counter drag, which increases with the square of your speed.
I would start by designing for twice as much thrust as your weight, so you can spend half your power on moving.
Big slow props are good for hovering and occasional bursts of high power, but for maximum range you want to be cruising at somewhere near full power (otherwise your motors are larger and heavier than necessary). Most photography drones are optimised for duration, not range.