RC2 vs RC-N2 controller with dedicated smartphone?

I am buying a Mini 4Pro and trying to understand whether it’s worth getting the RC2 or the RC-N2 and using a dedicated smart phone so I don’t have to hook it up every time.

The RC2 has a brightness of 700 nit which isn’t great in sunlight.

Instead, I can use the RC-N2 and buy a dedicated used smart phone for $100 with a brightness of more than 1000 nit which is much better, and would also have a significantly larger screen.

Any thoughts on whether this strategy makes sense are appreciated.