To construct furniture and other items of the sort. There already wasn't much wood in the great planes to begin with, so the wood they had they used for important stuff. Most of the houses were just made out of the soil in the great planes, sod.
Territory natural resources and trading routes
Having more land will allow them to have more resources, larger territories, and create trade routes to places further away from them
It would be out but I. Would take it.
Loud noises, workers everywhere, curious people, major repairs, Big machines.