Hunters are great powerlevelling chars Ok they don't do the aoe pulls (i use a mage to boost up to lvl 40 in sm) but they are great beyond 40. ZF is easy on a hunter (who cares about things running away) don't really have a problem in ST, BRD and scholo in my past experience. Admittedly I use a lvl 70 but i expect to boost my 4 shammies to outlands with the hunter (doing the occasional quest). For fun i put the pet on aggressive and let her control the pulls she's trouble sometimes

Your pc should have no problems running 2 accounts and could cope with more if needed.