I thought of peat or turf as a resource mined from the ground in small pits to build my new turf houses, but preferred a variant with it as a free/virtual building material. For fuel, we talked about peat some time ago on wob. I see problems with balancing because it should not displace firewood but leaving useless holes in the ground is not what players love. I also think that in reality it is not that easy. It contains rather less carbon and must be completely dry. However, in general it can work both in real and in game. :)