As promised I made a video for the expanded 2x3 version of PFA-Shelter. This version can still be deployed and dismantled within ca. 1 minute, given some practice. It is suitable for a first survival home if you spawn in flatlands, or a temporary wilderness base.
26 of any building block (only 6 more than PFA-Shelter 2x2). Wooden planks are best if you have no pickaxe, hardened/stained clay otherwise.
A crafting table
A single or double chest
1-3 wooden fences or iron bars for makeshift windows/arrowslits
I hope this fine and optimized design may appeal to the one or other traveler and hunter. I developed it while roaming through a non-cheat survival map full of vast savannas and deserts.