For me it's not quite usable on a 20x20 lot, that's why I am going to be placing it on a 30x30. When I did a test move it went well. There's room in the back of the house like I was hoping and space for a green house.
One thing I noticed is when placing it on the 30x30 lot it needs to be rotated to face the right direction. - This seems to be normal, specially when placing a house/building on a different lot. Something I should have known. *Blush*