Yep. And, just to be clear, that's what Uber does. Not in as simple and straightforward a way as you're suggesting, but at least large fractions of the time,

Yep. And, just to be clear, that's what Uber does. Not in as simple and straightforward a way as you're suggesting, but at least large fractions of the time, it pays its drivers more than its passengers pay it (for example: it's constantly giving me $10 coupons. It has sign-up bonuses and income guarantees for drivers. Etc.) Of course, it's spending investment money, not money from its other non-existent businesses. So if you and your fiancee want to try this business, you can do it right now with Uber. Or Lyft. I suspect you will find that despite the fact that there is theoretically a fair amount of money on the table here, they've made it obnoxious enough to get that you won't bother with it.