In this neck of the woods (deep South), I saw many, many houses shaped like that with two "front" doors when I was growing up. My aunt and uncle had one, in fact. One door led to the parlor/living room, the other to a bedroom. Few are left now because most weren't painted and were constructed with non-treated wood. In heavy humidity areas, they don't last many decades. It looks like the back bedroom was an add-on for more room or kitchen. The only one local that's left was featured in the newspaper about a year ago. It is still lived in. A wringer washing machine is on the front porch, and clothes generally hang from ropes stretched across the front porch. It was sealed back in the 40s with that fake brown brick-looking tar siding paper, so has held up fairly well, plus it's built up off the ground on blocks. No ground-to-board contact.
Really watch for varmints! And I'll bet that piano has real ivory keys. Yes, be sure to lift the top and check, and also drop down the knee panel. And looks like the ceiling/roof isn't too reliable, either. I'll be checking back! HH!!