I think it is well predictable. On our south-facing slope, it is 3m high over 10m length. We or rather the garden landscaper clearly miscalculated the costs. A good plan is important. You can definitely distribute the excavation well on the property. If necessary, a neighbor might also need some soil. Then you would basically only have the excavator work on the property. Transport and disposal would be eliminated. Do you already have ideas regarding one or more terraces? How should the transitions be designed (naturally slopes, L-stones, gabions, natural stone wall, ...)? You can also do quite a bit yourself. So I wouldn’t be generally discouraged by the property. Energetically, such a south-facing slope is top. What is the building envelope? Do you want to be as close as possible to the street, or rather as far away as possible?