very interested into what you end up doing--i myself got same 720 [47q, 42v] after cram prepping for a week (see my retake thread entitled "720 after 8 days prep, where to go from here for a 740+?" from about a month ago), and also hope to do a JD/MBA but at Cornell sans work experience. been casually prepping over the last month by completing then rewatching all the
magoosh videos and doing kaplan adaptive q bank questions. if you do retake, please share/message what approach you're going with, i'm interested to see what others in somewhat similar situations think/do.
also, if you're looking for a fitting MBA consultant i highly suggest Katherine Lewis at
MBA Mission--she's a top-of-her-class JD/MBA both from Harvard and all around affable lady i really enjoyed conversing with as compared to other consultants i considered. if i were you i would contact her about the 30min free initial consult and see what she has to say.
ps: if you're looking to talk test strategy/approaches/materials/etc. get at me in the messages. congrats on HLS, g'luck.