Generally C areas mean great cash flow but low appreciation. The cash flow pays down the mortgage and provides the equity growth.
We got lucky and got both, but it is a fairly unicorn situation. An area that has historically had little appreciation had a big slump. We bought at the low end and managed for cash flow. That was a solid move even if we sold for what we bought, but we have also seen incredible appreciation. With inflation and worse landlord friendly courts costs have increased but increased rent has covered it.
Honestly, I would focus on strong cash flow or highly desirable neighborhoods, manage well, and enjoy the ride.
Quote from @Andres Vergara:
What markets in your opinion has financially feasible SFH rentals in C areas with good equity growth. Is this a unicorn?
Look for Dave Meyers in the blogs or the YouTube page. He analyzes the best markets to invest in today.