"Joshua had seen a good few beach houses more deserving of the name "mansion" than "home", but the Old Man must have preferred simplicity - or else he'd been a cheap son of a bitch. There was not a lot to his home past the living area but three bedrooms, two of them so tiny they must have started life as a single and been divided after."
So, three bedrooms, eh? Yep, very simplistic. And incredibly convenient.