A Question about what to do in my game.
 

I am a lvl 17 warrior. I have already maxed out the tactics skills, and iron fist. I am not interested in the other might skills, except maybe bowman commander. A skill that I am considering getting is Inquisition in the mind tree. I am reluctant though and here is my question. Can I expect to have access to infinite(hoard) inquistioners later in the game? Is it possible and just not guaranteed? I already have access to tons of priests, so Inquisition would be a great skill for me if Inquisitioners are NOT availabe in hoards late game.

No, they're not easily avaible anywhere. But, to be honest, there are some more useful units. Unless you're planning Gift + Resurrection combo, that's good.