As others have said, a 5t would be best for the job.
I got the Solido Smart 2-8 which came on a low trailer behind a van. Since the unit is round the driver just rolled it off the side, but doubt you have this option. I had a 3t for the digging as was in a tight space which would have made using a 5t tricky. The 3t just managed to dig the hole (2m x 3m and 2m deep), but was pretty close to the limit for depth. Also, as mentioned, the arm wasn't long enough to lift the unit much off the ground, so woudn't have been much use for offloading.