Update Number 3:
STILL working on the sprite-work, but I'm very close to being done with the color blocking. All I need to do is the kitchen sprites and the bedroom desk (because I had forgotten it for some reason) before I can test out all the furniture and move onto finishing it. I want to try to get the sprite-work done this weekend so I can spend the rest of the week focusing on the game itself. I think I can get it done in time, and with my luck I can post an update today about the size test.
To save time I decided to do the sprites in a hard outline style with minimal shading and detail, it might not look the nicest but I don't think with the time limit I can do much better.
I hope to update again soon with good news about progress, as I have been struggling to keep focus with this much art that needs to be done and my anxiety about finishing the game on time has not been helping. We'll see though.