I did another paintover to show you where you could save space. The entire wood roof-supports are using the same texture so you should have them all share the same space. You can also dual purpose this support texture as trim.
If you were to put the roof support in-between the wall and roof tiling textures you can use that roof support as trim on the bottom or top of the wall or even with the roof.
I also drew in red how your roof geometry might better line up on top of each other on the roof tiling section giving more space for the geometry to capture more of the diffuse.
This is all very quick and im far from an industry veteran, but are you starting to see how the diffuse could almost come before you have unwrapped the geometry? you could apply a material like this to the house before you have unwrapped anything then as you strip off the facing planar faces just line it up with the section that applies.