Which Salt system for a 40k gallon pool

I have a k 38k gallon pool and i think it's time to replace my jandy nature2 (we don't use the metals side) with a new salt system. You say to double the size so what could I use? Seems every year we have issues. sadly we have little electrical knowledge. On open it said 172, 185,186 and we cleaned the salt cell and it said it again. So we cleaned the nodes and then it said 170 so we cleaned the plug contacts and now back to 172 185, 186....

This plus our jandy heater says upper hi limit... electrical is not our thing but I know replacing the salt system I could possibly budget for, just can't fix both in same year.

I do love salt systems for the feel on my skin. Disgusted by the constant price of new cells and error codes annually.
It definitely costs more for salt than chlorine ever cost.

Thanks for all your knowledge.

We also recalibrated the salt reading as it was reading over 4k when it's only 3200... strangely the temperature now indicates low when it's between 68-73 degrees...
I can't get a break.