If you want to flip then yearly appreciation rates should not matter much, as that will be a short term investment anyways, you are going to hold that property for max 6 months, all you need is a sweet deal below MV where you are pour your love into it make it look nice and sell it for the MV or little over the current MV2.

You mentioned that you are less concerned with cash flow right now, and that signals to me that you are probably better off finding the sweet spot for you with leverage.I would leverage and take on extra risk now while you are young and able to make great money, and maybe 20 years down the line, switch things up and start pushing to pay these properties off early.