I also took the 16 tile challenge. Here's what I've come up with. Although...I did have one discrepancy. *sad face*
3 Tiny Houses on One Lot:
https://lh5.googleusercontent.com/-HY-Wc5qhShw/VXmzIwtoX2I/AAAAAAAAUhY/nuV5qhQBmTs/w1536-h864-no/06-11-15_11-04%25C2%25A0AM.png
First House:
https://lh3.googleusercontent.com/-HSZPffFjOs4/VXmzOM-Oq-I/AAAAAAAAUhY/IbwvyKntbd0/w1536-h864-no/06-11-15_11-05%25C2%25A0AM.png
https://lh5.googleusercontent.com/-waqdje-r4fI/VXmzB4BCw2I/AAAAAAAAUhY/z6-3u5mWiOk/w1536-h864-no/06-11-15_10-47%25C2%25A0AM-5.png
https://lh3.googleusercontent.com/-0dDOR6mr1Zw/VXmyl7EQG4I/AAAAAAAAUhY/Hm79r6utBeE/w1536-h864-no/06-11-15_10-44%25C2%25A0AM.png
https://lh3.googleusercontent.com/-oPDD-OPsHMY/VXmysD1oklI/AAAAAAAAUhY/U6LAYBPvEXs/w1536-h864-no/06-11-15_10-45%25C2%25A0AM-4.png
https://lh5.googleusercontent.com/-xM9MRZgJUrg/VXmywEGmeAI/AAAAAAAAUhY/d2Oh0MF-0Qo/w1536-h864-no/06-11-15_10-46%25C2%25A0AM-2.png
https://lh3.googleusercontent.com/-kjyno4tL3EI/VXmzHhN2-aI/AAAAAAAAUhY/Jai7t_1sZBI/w1536-h864-no/06-11-15_11-01%25C2%25A0AM.png
Second House:
https://lh3.googleusercontent.com/-TS6NDjFAZTE/VXmzM9ThljI/AAAAAAAAUhY/c6coSPk3-iA/w1536-h864-no/06-11-15_11-04%25C2%25A0AM-4.png
https://lh3.googleusercontent.com/-YMjB_CS0JP8/VXmzDR07rtI/AAAAAAAAUhY/WoZZZB7mudM/w1536-h864-no/06-11-15_10-47%25C2%25A0AM-6.png
https://lh5.googleusercontent.com/-KuVlWPDs0jw/VXmyoTh5McI/AAAAAAAAUhY/DORmmeuSOQ0/w1536-h864-no/06-11-15_10-45%25C2%25A0AM.png
https://lh5.googleusercontent.com/-lWCAbmoxJ7w/VXmy9Os2pOI/AAAAAAAAUhY/UFTwuvMjiaE/w1536-h864-no/06-11-15_10-47%25C2%25A0AM.png
Third House:
https://lh5.googleusercontent.com/-b0NY_ldTjhk/VXmzLnQ1qzI/AAAAAAAAUhY/-uSE2G5ctXA/w1536-h864-no/06-11-15_11-04%25C2%25A0AM-3.png
https://lh3.googleusercontent.com/-fRirdutUE7Q/VXmzFAohDxI/AAAAAAAAUhY/sIf_7hBva4k/w1536-h864-no/06-11-15_10-48%25C2%25A0AM.png
https://lh3.googleusercontent.com/-X1H70OSaoko/VXmypZabY-I/AAAAAAAAUhY/6CHIo3aOEYU/w1536-h864-no/06-11-15_10-45%25C2%25A0AM-2.png
https://lh5.googleusercontent.com/-80cn43UCd98/VXmzGns6M8I/AAAAAAAAUhY/JIgymk6Yofw/w1536-h864-no/06-11-15_10-48%25C2%25A0AM-2.png
I tried to maximize counter space in 2 of the houses by placing a counter and then adding that pancake griddle on top of it. But they couldn't route to it. So I had to pull the counter out and since I hate the way that griddle thing doesn't fit into the counters, I changed it to a regular stove. Otherwise, everything else works. --Err...not the bookshelf, but I have a mod that makes stacks of books into bookshelves, so I don't worry about that too much. It's just for decoration.