I would look through a Walther's catalog at various structures. DPM is all brick construction (that is they are plastic, but replicate brick). You might want to vary your buildings, depending on the era you are modeling. You might want some wood framed houses. Perhaps some traditional city store type buildings. If more modern, some Pike Stuff steel "Butler" type buildings. If you get any one type and stick with it, the town just won't look realistic. Most towns have a variety of construction types. The exception is old west towns which tended to be slapped together with wood, until the town burned, then after the second or third fire, the would rebuild with brick.