For me, there are three main reasons to build modules instead a home layout: Space, flexibility and they are achievable. Modules take up less space Looking at 10 m of straight N-Scale track. Modules are flexible There are two aspects to this: The layout itself and the focus of your modelling interest. Schuppen Eins in Bremen in 2017 Schuppen Eins in Bremen in 2020: Same room, different layout If you like this flexibility, building modules and joining a club might be a thing for you.