T Beek is right.
I know of 3 commercial bee keepers around me and not a single one is a migratory bee keeper. One guy has a huge honey house, wood shop, and storage barn that probably cost $150,000+ to build. He gets around 32 tons of honey a year here in Michigan without moving hives. That’s 29,000kg of honey. How many kg is Finski getting?
As T Beek says, bee keeping is local, it depends a lot on your climate. In Michigan we have something flowing all summer long and it is not required to move hives around to get large yields. Could we get even bigger yields by moving hives to monoculture fields every couple of weeks? Maybe, but it is not necessary to be profitable in my area. Moving hives requires more labor, gasoline, time, and money; one must balance that against potentially higher yields, pesticide exposure, loss of bees and CCD.