Indeed, you are correct about it being a Buthid (narrow pedipalps). Highly probable on being B. jacksoni (notice the subaculear spine).
This species is quite short lived to around 3 inches max size (a couple years from birth). And, like Wade said, many are old aged when purchased as adults.
Could be... I find Hadogenes really needs a waterdish. They may be arid by origin, but they definitely require that constant water source. Other than that (and heat - I hear so much about scorps needing a varied heat range in their enclosures), they're supposed to be quite long-lived.