HELL NO.
Lightroom MUST be on sRGB.
You can't control how other people print, so don't even think about it. It will give you nightmares.
You just need to get your own house in order.
These instructions were correct.
I fear you're WAY over-thinking the calibration process. Just follow my instructions, including troubleshooting, exactly.
Have you followed my instructions all the way through? Including the troubleshooting part?
The Photoshop screenshot you attached is irrelevant. I need to see the Color Settings, not the Preferences.
Can you elaborate on this?
Have you got good bulbs for your room yet?
No they're not!
Your prints are what they are. They never change. Either the light you're viewing them in is too warm, or your screen is too cold.
5000K lights should be good. How do you think their light compares to daylight?
Yes, calibrate in dim light. But of course compare the prints to the screen in good light afterwards.
Gosh, well done!
I agree that the lighting works better at the RHS, but it's no biggie - go with where they want.
The question I have is, have you sufficiently damaged the digital photo to match the quality of the scan? May I see a 100% crop?