> The modern farm, even small family farms, relies on capital to do the work.
All businesses rely on the application of labor to capital; if that labor is largely that of the owners, the owners are petit bourgeois, if it is predominantly rented labor of the proletariat, the owners are haut bourgeois. (In the simple case where the owners derive their support exclusively from that property.)
> If management is considered labour then there is no such thing as upper-class.
Management is labor, but that fact does not mean that there aren't a distinct class of people who, while they may incidentally do some labor in the marketplace, relate to the economy and derive support within it primarily through the returns of capital whose value is realized primarily by renting labor from the proletariat.