That was the reason I gave it a miss. It looks too airy, but I like from 0.8 to 1.5mm. OP's father is a smoker and most smokers don't DTL.

Incidentally, there's a lot of cheap and good Kanthal here.

You can get a good set of 27, 28, 29, 30 gauges for 1 to 1.5 ohms and be covered for a while.