Thanks! To be fair, this is the cabin at bombshelter_md_01 and it's just one room that's already in pretty good shape. The only difference with A20 is that it now has a few zombo occupants whereas it was empty before. I use plates to make a loft in about 2/3 of the ceiling area (you can see the trellis that can be climbed to get up there) and the house itself only needs a few blocks repaired on the roof, plus the new back door. I only upgrade the house to cobblestone, because there's a wall around the property that's concrete with iron bars. If they breach that, I'm toast anyway. LOL That half-wall behind the sink / coffee maker is constructed from Sam's bookcases.
On the new save I started last night, I'm going to build from scratch. I've played enough of A20 now that I think I can make the most of the new trim blocks and such, and working on that cabin for the millionth time (I love that POI) helped me "practice" a bit.
90% of pretty is paint, and paint is SUPER cheap and easy to make from Day 1 these days. Back in the day of having to use the chem bench, oil, etc, I always freaked out about wasting any paint but now I just hit the campfire and make like 1000 and go nuts. I love paint. I do wish there were more "cleaner" paint textures available but I make it work.
Building in this game is what I do. I love it. I use modded 3-hour days and I spend my morning looting / visiting the trader, and my evening working on my home. It's probably no surprise that most of my other favorite games are those with building: Ark, Conan, No Man's Sky... I love creating homes.

The main difference for me with converting a POI vs building from scratch is that if I start with an empty lot, I also start with blood moon turned off because I don't know how long it will take for me to figure out what I want to build and I don't like to be rushed.. LOL I know I could hole up in a POI for the first couple of hordes but I don't really like doing that. Sometimes I just leave it off, sometimes I turn it on after I get started. I love how the game gives me all these options for playing the way I want to.