I painted it with acrylic artist paint. I then slopped on some darker color and wiped off with a damp paper towel. When dry dry brushed with white.
The foundation was made with pieces off pink foam as described before. Painted with raw umber and dry brushed with white.
The awning is a piece of corrugated cardboard with the outer paper covering removed. If you look around you can find corrugated cardboard in many sizes that will fit any scale except maybe N scale. The coffee cup insulation sleeves at my local coffee shop are great for HO.
I cheated on the windows. A friend made them on his 3D printer. They are a bit to thick but "the overall scene " not foreground modeling allows it.
HO scale Bachmann GE 44 Ton power truck. The old style had two separately powered trucks. The new ones have a single central motor with shaft drive (like Athearn). The old can often be found at train shows/swap meets and even old stock in shops. They run well but like many Bachmann engines the plastic axle gears sometimes split. They can be replaced or repaired. I posted a repair thread somewhere. I have also bought replacement power trucks with motors from the Bachmann online parts shop. They are about $15.00 but not always in stock.