Cool, my two cents below (which could be completely wrong). Sorry for the long answer - I'm idling my time too much now that my MBA application+decision journey is over haha
If you're confident of getting an H-1B visa to allow you to pursue your entrepreneurial goals in the US after the 12 month OPT, you probably want to enroll in Kellogg.
All things being equal, Wharton is "better" for entrepreneurship , especially with its San Fran campus which is very value-adding for many Whartonites. However all things are not equal for your situation due to 1) money being high up on your priority list, 2) the risk of not getting an H-1B visa is around 50% and you'd probably prefer not paying back your loan on a non-US income as they're mostly lower than US, and 3) the high inherent risk in entrepreneurship compared to other post-MBA careers, so the 50k+ delta (taking into account Wharton's higher expenses) is probably the swing consideration. But hypothetically, if you find a creative way to mitigate one or more of these three things, then Wharton may pip Kellogg. No easy answer, but any of the four options will open the doors you seek!