Holy shit You’re replacing ROMs on Android what year is it? Why don’t you just get a modern phone what do you have against that. Are you one of those people that’s afraid of 5G?

You consider that high power consumption? My home server usually sits around 320 Watts, and I still don’t consider that high power consumption.

If you want to get serious about this you will absolutely ditch windows immediately. I’m sorry that you feel that windows is needed but once you ditch windows your options and stability will increase exponentially.