Considering that there are videos of someone soloing a heroic cata instance as a hunter... I'm convinced ANYTHING is possible. However, how easy it would be? I'm not sure.

I'm still a fairly new boxer, but so far I have found Hunter to be the most challenging to control in a multi-class set-up due to the spacing + pet control. I find I have to pay more attention to the hunter in one of my groups way more than I do any caster DPS I've used.

That said - I say go for it.

I would have to imagine though you could do a lot of content with the use of formations etc. for spacing. Not sure for heavy moving fights. I know that solo hunter used some Tier 5 gear that heals pets which may be necessary to succeed in later instances.