Hello,
Actually I share 1 of your 3 concerns – lack of work experience. You don't need an elite undergrad institution, and the so-so GPA is not so bad for MBA programs – but it does necessitate a high GMAT when you take it. Also, your grades in the quant courses should be relatively high—if they are low, that would be problematic for your chances.
I consider your prospective candidacy to be idiosyncratic and therefore it’s hard to predict adcom responses. IF you have a great GMAT, I would still consider HBS and Stanford almost unrealistic
reaches – but it depends in part on the credibility and nature of your post-MBA entrepreneurial plans. The other programs – with stellar applications and a strong GMAT – would likely be reasonable reaches.