Re: Keep furniture in custom house for custom sims
@soomermaco I'm not sure exactly what you're asking. If you build and furnish a house, it will remain as you made it until and unless you manually edit it yourself. This is true even if you save the lot to the bin and place it later, in your original save or another. Sims won't buy or sell furniture on their own; the game isn't coded for that function.
If you're seeing certain items disappear from houses you've built, you might have an issue with custom content not loading properly. But that would be due to corruption in your TS3 game folder, not anything happening in-game. If your problem is different, it would help if you could describe exactly what you're seeing.