@Nikkei_Simmer
I've built houses like the one in your video. On the other hand, I've also built more complex homes while my Sims stand out by the mailbox in the rain watching the construction. My homes tend to always turn out looking the same, as I build for playability rather than aesthetics.
I have no decorating hacks because I don't like a lot of clutter taking up space in my game saves. Does that make me a bad Watcher?
My latest rags-to-riches home (Ultimate Legacy Challenge) started out as a 3x3 room with a sleeping bag on the floor and a cheap chair to sit in. The 1x3 bathroom had a toilet and the It's Not Gross public shower. No kitchen (she ate apples, quick meals at the fire station, or raided picnics in the park), therefore she didn't need a sink either.
Exterior:
https://texansky.files.wordpress.com/2023/07/3x4-exterior.jpg
Interior:
https://texansky.files.wordpress.com/2023/07/3x4-interior.jpg
Land: §1,000 to "buy" the land per the Ultimate challenge rules
Building: §1,950
Sleeping bag: §100
Bookshelf and chair §165
Total cost: §3,215
Prior to this home, she slept on the ground in a sleeping bag or at the fire station.