After the Transport of the Materials was done , It only needed the beams spreading, bit of insulation in between and above , Underfloor heating in and a bit of a plinths wall built around the whole thing... and done. How long can this take - maybe 4-5weeks ?

https://tintabernacle.blogspot.com/2021/09/plinths-wall-garden-wall-bricklaying_3.html