I'll provide a list of essential items here, but I will not be going into detail on many of them, as you can find that information in Carl's Newbie Guide. Every Sim will always need to worry about these three things (unless your Sim is a mummy!), so every home must include the ability to fulfill these needs. At the start of their journey, new Sims will spend a great deal of time at home - so why not make it an visually pleasing experience? If you're tired of building a big square with objects littered around the edges, or running out of funds when creating your first home, then you're in luck! I'm going to show you the basics on how to design an interesting layout for a single Sim or couple while still having space for important items and staying within your initial budget. Naturally, most of those simoleons are going towards your first house, whether it's pre-built or something of your own design.
The first few days can be a rough time for any new Sim - skilling, struggling for LTHP, and figuring out how to optimally spend that $16,500 wad in your pocket.
The Sims 3: Building Homes Guide to Better Houses for Beginners By Tom Thigpen Build and Edit in The Sims 3