With ceilings that are too low in the half-timbered house, there is little to gain. The ideas that Tamstar had are, with manageable effort, what is possible. I would rather consider whether one could make or build something airier out of one of the outbuildings, perhaps gradually. I know buildings with similar height; they showed no real market value and changed owners more frequently. From the aspect of value retention, I would view that cautiously. Best regards Gabriele