The houses many of the early settlers lived in were about that size. I guess it made a lot of sense at the time. Not much to heat in the winter. Some of them brought animals inside for heat.
I rented a cottage in the mountains once that looked about that big.When we arrived, there was a guy laying on the road tripping on something. There were about 20 other people like him giving us glassy stares. There were signs on the cabins that warned about hungry bears nearby.
After looking at the situation for a few minutes we decided to drive back home and forfeit the money we spent on the cabin. I hope you have better luck Mooch. I don't think your drum set will fit.