First piece of advice? Look up. Literally. Ceilings are the most under appreciated yet most influential surfaces in any interior space. They are also the most difficult to paint well, but once done, they stand the test of time. Not being at the people and pet level, they do not take the same abuse and are therefore worth doing right the first time.
Use FLAT flat flat paint. Please! Older homes and farmhouses in particular are never perfectly square, level or without wobbles in the plaster so a flat (no shine) ceiling paint is a must. I know the semi gloss on the last kitchen ceiling was easy to wipe Friday night beer bubble mishaps from, but it just never looked white. Or dry. Or really much different than the pale colour on the walls. It was just one big greige bubble.
The next issue is deciding on paint brand. Really almost any brand will do but I’m hoping this time the budget allows him to do better than the builder basic line. You get what you pay for is so true with all paint manufacturers. My advice? Go for mid range on any pale (mostly white) tinted colour. Save your money for the fully saturated accent walls and deep moody spaces. You will get the intensity with fewer coats if you spend a bit more.
A critical consideration is which white to use. He will roll his eyes. I will say “Look - you have 47 choices in one fan deck alone”, but really there are only a few. I will call them paste white, warm white and cool white. The first is most untinted ceiling paints - it usually looks pasty flat and without any character. Neutral is a good word here. Warm white has the tiniest bit of glow and cool white looks like an ice cube. It really doesn't matter which one except it has to be the same one throughout the whole house. Consistency is the key. Commitment is the problem.
I think I will bake something and invite myself over to offer some advice.