I recommend watching some videos on wall stacking. I like KCmo’s https://www.youtube.com/watch?v=NaqbBvjkY0Y
Looking at solo base builds also can show you some tricks for stacking objects in small areas
lots of weird tricks like stacking chests https://www.youtube.com/watch?v=dKYmhinJvoA
This is a pretty good video that avoids using exploits like double wall stacking that may be removed https://www.youtube.com/watch?v=hva0qiHPfWQ&index=8&list=WL&t=78s