Sweet Home 3D.
You can read my post about the backgrounds. I also have dynamic changing backgrounds that I use with my house floor plans.
Edit:
Sweet Home 3D is free software, and there are many model packs you can find and download for free. I'm not sure if the greenhouse object came with the basic models, or some pack I added. It is just an object like furniture, so no building of walls and rooms like my house backgrounds. Just drop in the greenhouse object and stretch it to size. You can still add things inside it, so I put in the tables and the plants.
If you liked playing The Sims because you could build houses, it can just be fun making the 3D backgrounds that look like your house and rooms.
Most of my icons come from SVG Repo, in one form or another. I use Inkscape on Windows, free in the windows store, to edit them a bit and customize them, and to make them look like specific devices, when I can't find the perfect icon as it is.
