Furniture is quite cheap right now. Most purple furniture is 2-3k on traders.
Let's say you spend an average if 1.5k on all furniture, multiplied by 700, that's just over 1 million gold.
To out things into perspective, when housing came out, I was paying 100k for individual purple pieces of furniture, 50k for blue, and 20k for green. I spent millions of gold on my first house since I wanted to decorate it asap.
not all furniture being used is of crafted variety. some is from achievement vendro, some from basic housing vendor which can skew prices all over the place (since you have your 100 gold trees, but you also have your 10k gold trees, and so on and so forth. some furnishings can cost upwards of 100k and there is absolutely no way to reduce THAT price as they are purchased from a vendor)
regardless, you are looking for a decent investment, even if you are relatively frugal. its possible to decorate with green only recipes and still have a comfortable lovely looking house. obviously, smaller houses will be cheaper both in initial purchase cost as well as decorating cost. but .... they are STILL going to cost you. probably 5 times + , at a minimum of what the house purchase itself cost you.
dirty worthless casual.
Reputation is what other people know about you. Honor is what you know about yourself. Guard your honor. Let your reputation fall where it will. And outlive the ***
There could be a big difference between "what it cost the builder" and "how much you'd spend if you bought everything".
You'll find furnishing plans for about half the things you can place in your homes, and those can create quite decent-looking arrangements. However, things like plants, building materials for custom extensions, can only be bought from the vendor. Some may need an achievement and an outlay of gold of crowns.
Making your own uses up materials you have to collect or buy, so there's another possible variation in actual costs. The rare materials will cost more than the common ones, and the plans bear little relationship to reality. A single bed may use more material than a double of the same design. And a footstool more than a wardrobe.