We are in the VERY beginning stages of planning the building of a panelised home on our land and we provided a floorplan we like to the builder. The estimate came back higher than their in house plans(to be expected) and the designer suggested to lower the cost we could go with 2x4 walls... What do y'all think? The BIGGEST expense was the windows-added $17,000 to the price!!! Now these were some osrt of expensive windows(Marvin Integrity brand.. ) and the windows are tall but the price works out to be over $1000 a window!!!! Anyway any thoughts would be helpful.