I do two a day because I am a human being and I don’t want any regrets with my wife and daughter. But around here we are expected to do radon, well, pest, etc, so our inspections take longer. I know a guy in another state that does three a day, but just the home inspection, and is home before I am.
I just saw an inspector yesterday and him and his partner are doing 5 a day together. I laughed at him, not because he was lying (he was telling the truth) but because I know those guys well. Both divorced, estranged from their kids, and the one drinks himself to sleep at night. Not saying everyone who does that many ends up like that, but I know too many guys in my area that do. That’s just my 2 cents.
There is an old proverb - a lover of silver will never be happy with income. It means if you’re in it for the money, you will never be happy