One problem with 547 is it does not take into consideration that some agricultural operations are no longer small operations like they used to be and they are basically small industrial plants. I have seen dairy barns, hog farms, and beef cattle operations with 1200+ amps services. The distribution point mentioned in 547.2 is the POCO padmount transformer. It will usually supply large switchgear in the main structure but additional structures will be supplied from that gear. Is probably the best way to do it but does not really comply with 547 requirements.
I do work at a dairy farm that has a bigger, nicer, better layed out mechanical room with 1200 amp 480 volt service in it than a small industrial plant that I also do work at that has even larger service supplying it.
This is not your father's or grandfathers dairy that was able to be supplied by 60 amps 120/240 single phase service. And they milk a lot more than 15-20 cows.