Make A Cement Mixer

Unbelievable, me and my builder laughed at it when it first turned up, looked like a tonker toy, but i have mixed every bucket of cement and concrete for my house renovation and surprised how good it is, one mix fills up 2 buckets so im mixing and my mate cement plasters which was perfect, keeping it in the garage to finish build and probably sell for 50, so build my house and make a profit.