I suggest firstly cloning the motel, recolouring it and changing it up a bit, and adding it on the other side of the road to make the road feel more full. You could also add some trash cans near the entrance of the motel, garbage cans. Then, you can elevate some parts of the terrain to make alike hills. You don’t need multiple tree models, you could just use 2 tree models, brush them over the new terrain, and resize some of them to make the forest look more filled.