Broken shower knob ,should I replace everything?

[Kumar Gaurav]

Hello

A shower knob broke in my rental most likely the cartridge is broken. I am wondering if I should replace the entire faucet with a new one and probably the shower too?

Enter set is about 3 years old.

How much it may cost for new one? I am also looking to see if I should do it myself.Any diy resources is much appreciated.

How much would a reasonable plumber charge me for this?

Thanks

Thanks

Thanks