This study analyses the management of machinery on farms growing sorghum as a drought-tolerant crop, and feedstock for renewable energy production, in addition to the cereals and oilseeds in the classical crop rotation, considering not only field operations but also logistical tasks and machinery usage costs. Furthermore, the machine operation characteristics specific to different farm-level production technologies have also been taken into account. It can be concluded that the difference between the costs of the small and the large-scale farm size is significant. This all can be explained with the efficiency of the machine exploitation. In the field of costs there is also a difference between the use of modern and less modern machines. In case of small-scale farm size, with using less modern power-machines a more advantageous cost level can be reached, although the quality of the work and the circumstances of the working must be considered. In case of large-scale farm size, the difference between the operational costs of the less modern and more modern machines decrease significantly, because the operation of the less modern machines is more expensive at larger strain and the high-level constant costs of the modern machines decrease significantly, according to their better exploitation, considering one unit of work.