Good farm buildings, and a nice clock!
Farms look decent.
I see your pillars had the same issue I had at one point: how do you get your tops to snap to the plane?
You can select each individual face, the top face of each pillar. Then begin to move those faces on the z axis (Aka, press “g” then “z”), and using the snap tool, you can go snap to edge and your faces should snap right onto the plane itself, giving it a smooth look. You could also go snap to face I think.
The instructor shows how to do it as he built his farm.